drm/i915: Rename plane YUV order bits

Rename the YUV byte order bits to be a bit more consistent.

v2: Deal with gvt

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211201152552.7821-3-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>