leds: various: use dev_of_node(dev) instead of dev->of_node

The dev_of_node function should be preferred.

Signed-off-by: Marek BehĂșn <marek.behun@nic.cz>
Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Baolin Wang <baolin.wang7@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Cc: Sean Wang <sean.wang@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Riku Voipio <riku.voipio@iki.fi>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
diff --git a/drivers/leds/leds-pca9532.c b/drivers/leds/leds-pca9532.c
index 7d515d5..b1ae34e 100644
--- a/drivers/leds/leds-pca9532.c
+++ b/drivers/leds/leds-pca9532.c
@@ -507,7 +507,7 @@ static int pca9532_probe(struct i2c_client *client,
 	struct pca9532_data *data = i2c_get_clientdata(client);
 	struct pca9532_platform_data *pca9532_pdata =
 			dev_get_platdata(&client->dev);
-	struct device_node *np = client->dev.of_node;
+	struct device_node *np = dev_of_node(&client->dev);
 
 	if (!pca9532_pdata) {
 		if (np) {