Compatibility with recent OS (Ubuntu 24.04 with kernel >= 6.0.0)

I faced a few difficulties to make a new DLS-MBF crate using a recent Vadatech micro-TCA rack (VT806) and a recent OS: Ubuntu 24.04. It eventually worked but required some modifications described here.

I will skip the difficulties with the VT806, but anyone can contact me if interested.

Regarding the OS there was 3 modifications required to use the DLS-MBF:
- driver: the DMA API changed in recent kernels
- segfault: pointers stored in read-only memory segment were modified due to some variables defined as const
- fpga_load: SCP's default configuration is not compatible with the AMC525

The modifications are available on [this branch](https://github.com/abdomit/DLS-MBF/tree/ubuntu24).

Finally, there was also a issue with EPICS 3.14 with a memory leak detected with the ADC or DAC MMS panel is opened. It seems that this is a bug with this old version of EPICS. The memory leak can be ignored by adding the following lines in `$EPICS_BASE/configure/os/CONFIG_SITE.linux-x86_64.linux-x86_64`:

```
OP_SYS_CFLAGS += -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
OP_SYS_CXXFLAGS += -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
```

I am really interested if someone has a better solution.

The best would probably be to make the DLS-MBF compatible with a recent version of EPICS, but I have absolutely no idea of the effort required.