lib/drmtest: Decode driver flags on failure

I spent too much time going wtf why does this test not run until
realizing that vgem is missing. This should help a lot for tests that
need multiple different drm drivers.

v2: Distinguish "any" and "other" (Chris).

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
1 file changed