powerpc/numa: Fix decimal permissions

This should have been octal.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/mm/numa.c

@@ -1785,7 +1785,7 @@ static const struct file_operations topology_ops = {
 static int topology_update_init(void)
 {
 	start_topology_update();
-	proc_create("powerpc/topology_updates", 644, NULL, &topology_ops);
+	proc_create("powerpc/topology_updates", 0644, NULL, &topology_ops);
 
 	return 0;
 }