Driver fails to load for Meteor Lake on Linux 6.9

Tested on Dell XPS 16 9640 with Ubuntu 24.04 (beta) and Linux kernel 6.9-rc4

```
[ 2.958449] intel-ipu6 0000:00:05.0: enabling device (0000 -> 0002)
[ 2.958540] intel-ipu6 0000:00:05.0: Device 0x7d19 (rev: 0x4)
[ 2.958550] intel-ipu6 0000:00:05.0: physical base address 0x522c000000
[ 2.958551] intel-ipu6 0000:00:05.0: mapped as: 0x000000004e245cb9
[ 2.958614] intel-ipu6 0000:00:05.0: IPU in secure mode
[ 2.958615] intel-ipu6 0000:00:05.0: IPU secure touch = 0x80000000
[ 2.958616] intel-ipu6 0000:00:05.0: IPU camera mask = 0x0
...
[ 2.970260] intel-ipu6 0000:00:05.0: IPC reset done
[ 2.970262] intel-ipu6 0000:00:05.0: cpd file name: intel/ipu6epmtl_fw.bin
[ 2.970367] intel-ipu6 0000:00:05.0: Direct firmware load for intel/ipu6epmtl_fw.bin failed with error -2
[ 2.970370] intel-ipu6 0000:00:05.0: Requesting signed firmware failed
[ 2.970376] intel-ipu6 0000:00:05.0: probe with driver intel-ipu6 failed with error -2
```

Also, copying the `ipu6epmtl_fw.bin` file up one directory where it is expected leads to further actions, but no functioning camera.