ci: freedreno a530 (db820c) GLES3 testing
Now that the db410c stuff is in place and I came up with a kernel that actually boots and probes msm drm, it's not too hard to turn on. Hopefully some day we can fix the upstream kernel bugs and not use this funny prebuilt kernel I made.
And, now that we have testing enabled, port a fix I made to a3xx to clean up our xfail list a bunch.