Added missing CM3 Revision

This should allow a different variation of the CM3 Module to work.

Added RPi Compute Module Detection

Added initial Compute Module detection, plus added CM3+ Rev code.

Added support for Sifive's HiFive Unleashed

Added support for Sifive's HiFive Unleashed for Blinka

1GB, 2GB, and 4GB models of Raspberry Pi 4 Supported

Previously only the 4GB model was being detected, but now 1GB, 2GB, and 4GB models of Raspberry Pi 4 detected.

Added Raspberry Pi 4B

As needed for Blinka

Updated 96boards detection to be more specific

Since we're only adding DragonBoard 410c support at the moment, that is now the only board returned.

Fixed issue with FileNotFound error on some devices

This should resolve a FileNotFound error that was occurring on some devices as the result of a previous merge.

Added DragonBoard 410c Detection

As required for Blinka thanks to @ric96 and @brennen

Improved Odroid C2 Detection

As needed for Blinka

Added Orange Pi R1 detection

Added Orange Pi R1 detection in addition to Orange Pi PC thanks to @kouliss