Add hardware definitions for pycom, syncrobit cm4, risinghf, linxdot radxa cm3, syncrobit radxa cm3

[shawaj]

Add hardware definitions for

• [x] pycom
• [x] syncrobit cm4
• [ ] risinghf
• [ ] linxdot radxa cm3
• [ ] syncrobit radxa cm3

These are all based on Raspberry Pi or Radxa boards

[shawaj]

More platform specific info here

https://github.com/syncrobit/chameleonos/tree/main/board/common/overlay/etc/platforms

[shawaj]

Linxdot Radxa CM3 might actually not be a trade cm3. Looks like possibly some other rockchip part.

See #120 pictures

[shawaj]

Rising HF #161

[shawaj]

Linxdot Rockchip DTB rk3566-linxdot-r01.zip