Bootloader needs to be at 0x400 for IMX6 devices. That is ignored by
pmbootstrap which places the GPT header there. Revert to msdos partition
table style to workaround that bug.
For now, limited support without graphics. Graphics
support would need messing and detecting board variants.
especially since Rev B seems to need a vcom setting per batch.
[ci:skip-build]: already built successfully in CI
Andreas Kemnade