hwmon: 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: Guenter Roeck <linux@roeck-us.net>
diff --git a/drivers/hwmon/max6639.c b/drivers/hwmon/max6639.c
index 3e7b426..066e587 100644
--- a/drivers/hwmon/max6639.c
+++ b/drivers/hwmon/max6639.c
@@ -428,7 +428,7 @@
 {
 	struct max6639_data *data = i2c_get_clientdata(client);
 	struct max6639_platform_data *max6639_info =
-		client->dev.platform_data;
+		dev_get_platdata(&client->dev);
 	int i;
 	int rpm_range = 1; /* default: 4000 RPM */
 	int err;