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-lm355x.c b/drivers/leds/leds-lm355x.c
index d81a8e7..591eb5e 100644
--- a/drivers/leds/leds-lm355x.c
+++ b/drivers/leds/leds-lm355x.c
@@ -423,7 +423,7 @@
 static int lm355x_probe(struct i2c_client *client,
 				  const struct i2c_device_id *id)
 {
-	struct lm355x_platform_data *pdata = client->dev.platform_data;
+	struct lm355x_platform_data *pdata = dev_get_platdata(&client->dev);
 	struct lm355x_chip_data *chip;
 
 	int err;