intel/compiler: use nir_metadata_none instead of its value

Signed-off-by: Marcin Ślusarz <marcin.slusarz@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13189>

src/intel/compiler/brw_nir_tcs_workarounds.c

@@ -131,5 +131,5 @@ brw_nir_apply_tcs_quads_workaround(nir_shader *nir)
       emit_quads_workaround(&b, end_preds[i]);
    }
 
-   nir_metadata_preserve(impl, 0);
+   nir_metadata_preserve(impl, nir_metadata_none);
 }