regulator: 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: Mark Brown <broonie@linaro.org>
diff --git a/drivers/regulator/da9055-regulator.c b/drivers/regulator/da9055-regulator.c
index 3022109..77b53e5 100644
--- a/drivers/regulator/da9055-regulator.c
+++ b/drivers/regulator/da9055-regulator.c
@@ -535,7 +535,7 @@
 	struct regulator_config config = { };
 	struct da9055_regulator *regulator;
 	struct da9055 *da9055 = dev_get_drvdata(pdev->dev.parent);
-	struct da9055_pdata *pdata = da9055->dev->platform_data;
+	struct da9055_pdata *pdata = dev_get_platdata(da9055->dev);
 	int ret, irq;
 
 	if (pdata == NULL || pdata->regulators[pdev->id] == NULL)