Use the new-style function using drm fourcc codes instead everywhere.
To easily use thew fourcc based interface also expose
bpp_depth_to_drm_format from the library. Finally include drm_fourcc.h
from the igt_kms.h header since pretty much everyone needs this now.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Functions which provide feature checks through igt_skip should be of
the form <prefix>_require_<feature>.
Otoh feature checks which return in a boolean whether the feature is
available should be of the form <prefix>_has_<feature>, e.g.
gem_has_blt.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
