iris: setup stage bitmask for Wa_22011440098
Fixes: 40b66a44 ("anv, iris: Add Wa_22011440098 for DG2") Signed-off-by:Tapani Pälli <tapani.palli@intel.com> Reviewed-by:
Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <mesa/mesa!19636> (cherry picked from commit 210d95bd)