intel/nir: Fixup deref modes after lowering patch vertices

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/mesa/drivers/dri/i965/brw_nir_uniforms.cpp

@@ -292,4 +292,6 @@ brw_nir_lower_patch_vertices_in_to_uniform(nir_shader *nir)
       exec_node_remove(&var->node);
       exec_list_push_tail(&nir->uniforms, &var->node);
    }
+
+   nir_fixup_deref_modes(nir);
 }