Remove large folders of firmware that (probably) isn't needed

[crschardt]

There are a lot of firmware files included in the OrangePi images that are for hardware that isn't likely to be used with PhotonVision.

Here are the largest directories:

pi@photonvision:~$ du -sch /usr/lib/firmware/* | sort -rh | head
588M    total
78M     /usr/lib/firmware/mrvl
78M     /usr/lib/firmware/mellanox
74M     /usr/lib/firmware/6.1.0-1025-rockchip
59M     /usr/lib/firmware/qcom
41M     /usr/lib/firmware/nvidia
28M     /usr/lib/firmware/intel
23M     /usr/lib/firmware/amdgpu
19M     /usr/lib/firmware/rkwifi
15M     /usr/lib/firmware/mediatek

While some, like "6.1.0-1025-rockchip" are going to be needed, most of these are for hardware that isn't present on the Orange Pi 5 SBCs.

This PR removes:

• mrvl
• mellanox
• qcom
• nvidia
• intel
• amdgpu

[mcm001]

From googling I'm having a hard time telling which of these firmwares are expected to be needed vs not. But most of the mrvl drivers look to be WiFi related so that's good to yeet. Just want to make sure we don't accidentally break USB hubs or something.

[crschardt]

I'm being agressive here to see if we can find something that breaks. I'll keep it draft until we are really confident that it's OK.

[crschardt]

But, on the plus side, the compressed OPi5 image is down to 611 MB.

[mcm001]

I bet those rkwifi drivers can go too. And do we already purge manages and apt cache and stuff?