libcamera: BCM2835_ISP_BASE different between 5.10.y and libcamera vs 5.12.y and 5.13.y

Compare the BCM2835_ISP_BASE definitions in the kernel and libcamera v4l2-controls.h files, then trace the reported ISP control failure in raspberrypi.cpp. Run cam -c 1 -C 1 with kernel 5.12.y or 5.13.y and confirm the camera configures without the missing-control error.

Describe the bug
Due to a mismatch in the BCM2835_ISP_BASE between libcamera and kernel 5.12.y and kernel 5.13.y, libcamera will not work with rpi unless its v4l2-controls.h is also modified to match the kernel v4l2-controls.h

kernel 5.12.y and 5.13.y v4l2-controls.h
#define V4L2_CID_USER_BCM2835_ISP_BASE (V4L2_CID_USER_BASE + 0x10f0)

kernel 5.10.y and libcamera v4l2-controls.h
#define V4L2_CID_USER_BCM2835_ISP_BASE (V4L2_CID_USER_BASE + 0x10e0)

To reproduce
Use kernel 5.12.y or 5.13.y with current libcamera HEAD
cam -c 1 -C 1

Expected behaviour
root@raspberrypi4-64:~# cam -c 1 -C 1
[1:54:10.449586656] [622] INFO Camera camera_manager.cpp:296 libcamera v0.0.0+2747-fb970d9c-dirty (2021-07-08T15:00:29+00:00)
[1:54:10.479843682] [623] WARN CameraSensor camera_sensor.cpp:197 'ov5647 10-0036': Recommended V4L2 control 0x009a0922 not supported
[1:54:10.479959532] [623] WARN CameraSensor camera_sensor.cpp:249 'ov5647 10-0036': The sensor kernel driver needs to be fixed
[1:54:10.480060234] [623] WARN CameraSensor camera_sensor.cpp:251 'ov5647 10-0036': See Documentation/sensor_driver_requirements.rst in the libcamera sources for more information
[1:54:10.481761242] [623] WARN CameraSensor camera_sensor.cpp:403 'ov5647 10-0036': Failed to retrieve the camera location
Using camera /base/soc/i2c0mux/i2c@1/ov5647@36
[1:54:10.757968853] [622] WARN V4L2 v4l2_pixelformat.cpp:181 Unsupported V4L2 pixel format XB24
[1:54:10.759028946] [622] INFO Camera camera.cpp:912 configuring streams: (0) 800x600-NV12
[1:54:10.759326886] [623] INFO RPI raspberrypi.cpp:122 Mode: 2592x1944 fmt BG10 Score: 2284 (best 2284)
[1:54:10.759443328] [623] INFO RPI raspberrypi.cpp:122 Mode: 1920x1080 fmt BG10 Score: 2066.67 (best 2066.67)
[1:54:10.759524012] [623] INFO RPI raspberrypi.cpp:122 Mode: 1296x972 fmt BG10 Score: 1717 (best 1717)
[1:54:10.759600048] [623] INFO RPI raspberrypi.cpp:122 Mode: 640x480 fmt BG10 Score: 2060 (best 1717)
[1:54:10.759678250] [623] INFO RPI raspberrypi.cpp:122 Mode: 2592x1944 fmt pBAA Score: 1784 (best 1717)
[1:54:10.759753527] [623] INFO RPI raspberrypi.cpp:122 Mode: 1920x1080 fmt pBAA Score: 1566.67 (best 1566.67)
[1:54:10.759829507] [623] INFO RPI raspberrypi.cpp:122 Mode: 1296x972 fmt pBAA Score: 1217 (best 1217)
[1:54:10.759904172] [623] INFO RPI raspberrypi.cpp:122 Mode: 640x480 fmt pBAA Score: 1560 (best 1217)
[1:54:10.760168797] [623] INFO RPI raspberrypi.cpp:619 Sensor: /base/soc/i2c0mux/i2c@1/ov5647@36 - Selected mode: 1296x972-pBAA
[1:54:10.792911540] [623] INFO RPISTREAM rpi_stream.cpp:122 No buffers available for ISP Output0
[1:54:10.793035223] [623] INFO RPISTREAM rpi_stream.cpp:122 No buffers available for ISP Output0
[1:54:10.793097574] [623] INFO RPISTREAM rpi_stream.cpp:122 No buffers available for ISP Output0
[1:54:10.793153203] [623] INFO RPISTREAM rpi_stream.cpp:122 No buffers available for ISP Output0
Capture until user interrupts by SIGINT
[1:54:10.896572493] [623] INFO RPI raspberrypi.cpp:1597 Dropping frame at the request of the IPA (7 left)
[1:54:10.941121203] [623] INFO RPI raspberrypi.cpp:1597 Dropping frame at the request of the IPA (6 left)
[1:54:10.975176128] [623] INFO RPI raspberrypi.cpp:1597 Dropping frame at the request of the IPA (5 left)
[1:54:11.011654716] [623] INFO RPI raspberrypi.cpp:1597 Dropping frame at the request of the IPA (4 left)
[1:54:11.041434583] [623] INFO RPI raspberrypi.cpp:1597 Dropping frame at the request of the IPA (3 left)
[1:54:11.074707577] [623] INFO RPI raspberrypi.cpp:1597 Dropping frame at the request of the IPA (2 left)
[1:54:11.141787814] [623] INFO RPI raspberrypi.cpp:1597 Dropping frame at the request of the IPA (1 left)
[1:54:11.208628796] [623] INFO RPI raspberrypi.cpp:1597 Dropping frame at the request of the IPA (0 left)
6851.241004 (0.00 fps) stream0 seq: 000008 bytesused: 720000
6851.301087 (16.64 fps) stream0 seq: 000009 bytesused: 720000
6851.361170 (16.64 fps) stream0 seq: 000010 bytesused: 720000
6851.421255 (16.64 fps) stream0 seq: 000011 bytesused: 720000
6851.481339 (16.64 fps) stream0 seq: 000012 bytesused: 720000

Actual behaviour
root@raspberrypi4-64:~# cam -c 1 -C 1
[0:00:50.949234727] [290] INFO Camera camera_manager.cpp:294 libcamera v0.0.0+2582-2a103ba1-dirty (2021-07-04T00:48:24+00:00)
[0:00:50.980585042] [291] WARN CameraSensor camera_sensor.cpp:307 'ov5647 10-0036': Recommended V4L2 control 0x009a0922 not supported
[0:00:50.981056579] [291] WARN CameraSensor camera_sensor.cpp:359 'ov5647 10-0036': The sensor kernel driver needs to be fixed
[0:00:50.981136653] [291] WARN CameraSensor camera_sensor.cpp:361 'ov5647 10-0036': See Documentation/sensor_driver_requirements.rst in the libcamera sources for more information
[0:00:50.983345857] [291] WARN CameraSensorProperties camera_sensor_properties.cpp:61 No static properties available for 'ov5647'
[0:00:50.983423968] [291] WARN CameraSensorProperties camera_sensor_properties.cpp:63 Please consider updating the camera sensor properties database
[0:00:50.983959857] [291] WARN CameraSensor camera_sensor.cpp:487 'ov5647 10-0036': Failed to retrieve the camera location
Using camera /base/soc/i2c0mux/i2c@1/ov5647@36
[0:00:51.030133450] [290] WARN V4L2 v4l2_pixelformat.cpp:180 Unsupported V4L2 pixel format XB24
[0:00:51.031235820] [290] INFO Camera camera.cpp:905 configuring streams: (0) 800x600-NV12
[0:00:51.031607542] [291] INFO RPI raspberrypi.cpp:122 Mode: 2592x1944 fmt BG10 Score: 2284 (best 2284)
[0:00:51.031724042] [291] INFO RPI raspberrypi.cpp:122 Mode: 1920x1080 fmt BG10 Score: 2066.67 (best 2066.67)
[0:00:51.031807802] [291] INFO RPI raspberrypi.cpp:122 Mode: 1296x972 fmt BG10 Score: 1717 (best 1717)
[0:00:51.031886098] [291] INFO RPI raspberrypi.cpp:122 Mode: 640x480 fmt BG10 Score: 2060 (best 1717)
[0:00:51.031995487] [291] INFO RPI raspberrypi.cpp:122 Mode: 2592x1944 fmt pBAA Score: 1784 (best 1717)
[0:00:51.032133227] [291] INFO RPI raspberrypi.cpp:122 Mode: 1920x1080 fmt pBAA Score: 1566.67 (best 1566.67)
[0:00:51.032242042] [291] INFO RPI raspberrypi.cpp:122 Mode: 1296x972 fmt pBAA Score: 1217 (best 1217)
[0:00:51.032346283] [291] INFO RPI raspberrypi.cpp:122 Mode: 640x480 fmt pBAA Score: 1560 (best 1217)
[0:00:51.032645968] [291] INFO RPI raspberrypi.cpp:619 Sensor: /base/soc/i2c0mux/i2c@1/ov5647@36 - Selected mode: 1296x972-pBAA
[0:00:51.034692653] [291] ERROR IPARPI raspberrypi.cpp:549 Unable to find ISP control 0x009819e1
[0:00:51.034778598] [291] ERROR IPARPI raspberrypi.cpp:347 ISP control validation failed.
[0:00:51.034837042] [291] ERROR RPI raspberrypi.cpp:1291 IPA configuration failed!
[0:00:51.034904802] [291] ERROR RPI raspberrypi.cpp:756 Failed to configure the IPA: -32
Failed to configure camera