mfd: 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: Lee Jones <lee.jones@linaro.org>

drivers/mfd/lp8788.c

@@ -173,7 +173,7 @@ static const struct regmap_config lp8788_regmap_config = {
 static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 {
 	struct lp8788 *lp;
-	struct lp8788_platform_data *pdata = cl->dev.platform_data;
+	struct lp8788_platform_data *pdata = dev_get_platdata(&cl->dev);
 	int ret;
 
 	lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL);