crocus: Lower load_base_workgroup_id to zero

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20068>

src/gallium/drivers/crocus/crocus_program.c

@@ -476,6 +476,13 @@ crocus_setup_uniforms(ASSERTED const struct intel_device_info *devinfo,
          nir_ssa_def *offset;
 
          switch (intrin->intrinsic) {
+         case nir_intrinsic_load_base_workgroup_id: {
+            /* GL doesn't have a concept of base workgroup */
+            b.cursor = nir_instr_remove(&intrin->instr);
+            nir_ssa_def_rewrite_uses(&intrin->dest.ssa,
+                                     nir_imm_zero(&b, 3, 32));
+            continue;
+         }
          case nir_intrinsic_load_constant: {
             /* This one is special because it reads from the shader constant
              * data and not cbuf0 which gallium uploads for us.