DRM 4CCs are defined in little-endian, and can be declined in a
big-endian version by setting bit 31 (DRM_FORMAT_BIG_ENDIAN) in the 4CC
value.
Add support for such formats in the gen-formats.py script.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>