leds: use dev_get_platdata()

Use the wrapper function for retrieving the platform data instead of
accessing dev->platform_data directly.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c
index 1392feb..9e28dd0 100644
--- a/drivers/leds/leds-lp5521.c
+++ b/drivers/leds/leds-lp5521.c
@@ -420,7 +420,7 @@
 	struct lp55xx_platform_data *pdata;
 	struct device_node *np = client->dev.of_node;
 
-	if (!client->dev.platform_data) {
+	if (!dev_get_platdata(&client->dev)) {
 		if (np) {
 			ret = lp55xx_of_populate_pdata(&client->dev, np);
 			if (ret < 0)
@@ -430,7 +430,7 @@
 			return -EINVAL;
 		}
 	}
-	pdata = client->dev.platform_data;
+	pdata = dev_get_platdata(&client->dev);
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)