Fixes several of the
"dEQP-GLES31.functional.image_load_store*load_store*single_layer" dEQP
tests that use image formats we implement using untyped surface
messages.

Cc: mesa-stable@lists.freedesktop.org
Tested-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>