Prepare for better device categorization by moving everything to testing
subdir first.
[skip-ci]: chicken-egg problem: passing pmaports CI depends on pmbootstrap MR
depends on this MR
Related: postmarketos#16
Use the new mesa-freedreno package. Configure inittab to start a
terminal on ttyMSM0 (serial). Remove fbdev from xorg.conf and set
SWCursor on.
Based on patches from Brian Masney.