of: Convert to using %pOFn instead of device_node.name

In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

Reviewed-by: Frank Rowand <frank.rowand@sony.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>

drivers/of/overlay.c

@@ -425,8 +425,8 @@ static int build_changeset_next_level(struct overlay_changeset *ovcs,
 	for_each_child_of_node(overlay_node, child) {
 		ret = add_changeset_node(ovcs, target_node, child);
 		if (ret) {
-			pr_debug("Failed to apply node @%pOF/%s, err=%d\n",
-				 target_node, child->name, ret);
+			pr_debug("Failed to apply node @%pOF/%pOFn, err=%d\n",
+				 target_node, child, ret);
 			of_node_put(child);
 			return ret;
 		}