dri: Add 10 bpc formats as available formats. (v2)

dri: Add 10 bpc formats as available formats. (v2)

Used to support ARGB2101010 and XRGB2101010
winsys framebuffers / drawables, but added
other 10 bpc fourcc's as well for consistency
with definitions in wayland_drm.h, gbm.h, and
drm_fourcc.h.

v2: Align new defines with tabs instead of spaces, for
    consistency with remainder of that block of definitions,
    as suggested by Tapani.

Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>