i965: Add uniform for a CS thread local base ID

v4:
 * Force thread_local_id_index to -1 for now, and have
   fs_visitor::setup_cs_payload look at thread_local_id_index. This
   enables us to more easily cut over from the old local ID layout to
   the new layout, as suggested by Jason.

Cc: "12.0" <mesa-stable@lists.freedesktop.org>
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/vulkan/anv_pipeline.c

@@ -338,6 +338,10 @@ anv_pipeline_compile(struct anv_pipeline *pipeline,
       pipeline->needs_data_cache = true;
    }
 
+   if (stage == MESA_SHADER_COMPUTE)
+      ((struct brw_cs_prog_data *)prog_data)->thread_local_id_index =
+         prog_data->nr_params++; /* The CS Thread ID uniform */
+
    if (nir->info.num_ssbos > 0)
       pipeline->needs_data_cache = true;