net: dsa: realtek: Use for_each_child_of_node_scoped()

Avoid need to manually handle of_node_put() by using
for_each_child_of_node_scoped(), which can simplfy code.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/dsa/realtek/rtl8366rb.c

@@ -1009,8 +1009,8 @@ static int rtl8366rb_setup_all_leds_off(struct realtek_priv *priv)
 
 static int rtl8366rb_setup_leds(struct realtek_priv *priv)
 {
-	struct device_node *leds_np, *led_np;
 	struct dsa_switch *ds = &priv->ds;
+	struct device_node *leds_np;
 	struct dsa_port *dp;
 	int ret = 0;
 
@@ -1025,13 +1025,11 @@ static int rtl8366rb_setup_leds(struct realtek_priv *priv)
 			continue;
 		}
 
-		for_each_child_of_node(leds_np, led_np) {
+		for_each_child_of_node_scoped(leds_np, led_np) {
 			ret = rtl8366rb_setup_led(priv, dp,
 						  of_fwnode_handle(led_np));
-			if (ret) {
-				of_node_put(led_np);
+			if (ret)
 				break;
-			}
 		}
 
 		of_node_put(leds_np);