This is to allow USB 3.0 Capture Cards to be used in the top USB port, this is to allow Macrosilicon's MS2130 to be used with PiKVM, when doing this it must also be switched to pixel format yuyv in the override.yaml
Adds support for the following new revision of the board:
# tr < /proc/device-tree/model -d '\000'
Raspberry Pi 4 Model B Rev 1.5
Without this, `/dev/video19` from the `rpivid_hevc` driver gets incorrectly linked to `/dev/kvmd-video`
```bash
lrwxrwxrwx 1 root root 6 Sep 28 08:14 /dev/kvmd-video -> video19
```