nir: rename nir_foreach_block*() to nir_foreach_block*_call()

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/compiler/nir/nir_lower_io.c

@@ -403,7 +403,7 @@ nir_lower_io_impl(nir_function_impl *impl,
    state.modes = modes;
    state.type_size = type_size;
 
-   nir_foreach_block(impl, nir_lower_io_block, &state);
+   nir_foreach_block_call(impl, nir_lower_io_block, &state);
 
    nir_metadata_preserve(impl, nir_metadata_block_index |
                                nir_metadata_dominance);