gallium/dri2: Support I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS

Add a case for this modifier in dri2_get_modifier_num_planes.

Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5420>
1 file changed