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>
diff --git a/drivers/mfd/tps65912-core.c b/drivers/mfd/tps65912-core.c
index 479886a..925a044 100644
--- a/drivers/mfd/tps65912-core.c
+++ b/drivers/mfd/tps65912-core.c
@@ -123,7 +123,7 @@
 
 int tps65912_device_init(struct tps65912 *tps65912)
 {
-	struct tps65912_board *pmic_plat_data = tps65912->dev->platform_data;
+	struct tps65912_board *pmic_plat_data = dev_get_platdata(tps65912->dev);
 	struct tps65912_platform_data *init_data;
 	int ret, dcdc_avs, value;