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/da9055-core.c b/drivers/mfd/da9055-core.c
index e4c0596..d3670cd 100644
--- a/drivers/mfd/da9055-core.c
+++ b/drivers/mfd/da9055-core.c
@@ -379,7 +379,7 @@
 
 int da9055_device_init(struct da9055 *da9055)
 {
-	struct da9055_pdata *pdata = da9055->dev->platform_data;
+	struct da9055_pdata *pdata = dev_get_platdata(da9055->dev);
 	int ret;
 	uint8_t clear_events[3] = {0xFF, 0xFF, 0xFF};