intel/compiler: don't lower swizzles in backend.

These are lowered by crocus in the frontend, the key
entries are still used.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14202>
1 file changed