gbm: add XBGR8888 support for dumb buffers

Add GBM_FORMAT_XBGR8888 format support which is needed for Android.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
1 file changed