anv: preserve all metadata when anv_nir_lower_multiview doesn't make progress

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/vulkan/anv_nir_lower_multiview.c

@@ -279,6 +279,8 @@ anv_nir_lower_multiview(nir_shader *shader,
    if (progress) {
       nir_metadata_preserve(entrypoint, nir_metadata_block_index |
                                         nir_metadata_dominance);
+   } else {
+      nir_metadata_preserve(entrypoint, nir_metadata_all);
    }
 
    return progress;