intel/blorp: Handle clearing of A4B4G4R4 on all platforms

Tested-by: Mark Janes <mark.a.janes@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Cc: "13.0 17.0" <mesa-stable@lists.freedesktop.org>
(cherry picked from commit a0348b5a0b679a78b3f49d41f980dec6066cc541)
1 file changed