Remove warning on every gpio pin allocated from
device tree.
================================================
diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c
index 1688f576ee8a..eae7c9d72c1a 100644
--- a/drivers/of/overlay.c
+++ b/drivers/of/overlay.c
@@ -362,7 +362,7 @@ static int add_changeset_property(struct overlay_changeset *ovcs,
	}

	if (!of_node_check_flag(target->np, OF_OVERLAY))
-		pr_err("WARNING: memory leak will occur if overlay removed, property: %pOF/%s\n",
+		pr_debug("WARNING: memory leak will occur if overlay removed, property: %pOF/%s\n",
 		       target->np, new_prop->name);
 
 	if (ret) {