rk3566 support

[black-device]

Hi! good job,

plan to add devices:
radxa-cm3 ? (rk3566)

thank you!

[pyavitz]

Hi! good job,

plan to add devices: radxa-cm3 ? (rk3566)

thank you!

I no longer add units that I don't have available to me. Which is why most of the RK units here have been removed or sources pulled from git.

If someone wants to add it, they are more than welcome.