gallium/radeon: return correct values for BE in r600_translate_colorswap

Because I changed the swizzle check, I also need to adapt the return
values for each check.

It's basically almost the same as before, we just cross between STD and
STD_REV, and cross between ALT and ALT_REV

This fixes the rgba test in gl-1.0-readpixsanity (piglit) and also
fixes tri-flat (mesa demos).

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
1 file changed