[BPI-M7] ArchLinuxArm build script

Today I received my BPI-M7 (ArmSoM-Sige7).

So I can now introduce my buildscript for the BPI-M7. Still in Alfa phase, but the boards boots. Should even be able to boot from nvme :slight_smile:

It boots mainline U-Boot and mainline linux (collabora version).

For now, only input/output on UART2 (on 40pin header). Be carefull, 3.3V only!

So only booting until command prompt tested, the rest all still have to test.

1 of the two ethernet ports should be setup to have an ip number (still have to figure out which one). Should be ssh access to it.