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/88pm800.c

@@ -541,7 +541,7 @@ static int pm800_probe(struct i2c_client *client,
 {
 	int ret = 0;
 	struct pm80x_chip *chip;
-	struct pm80x_platform_data *pdata = client->dev.platform_data;
+	struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);
 	struct pm80x_subchip *subchip;
 
 	ret = pm80x_init(client);