gpio: 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: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-da9052.c b/drivers/gpio/gpio-da9052.c
index 29b11e9..9b77dc0 100644
--- a/drivers/gpio/gpio-da9052.c
+++ b/drivers/gpio/gpio-da9052.c
@@ -216,7 +216,7 @@
 		return -ENOMEM;
 
 	gpio->da9052 = dev_get_drvdata(pdev->dev.parent);
-	pdata = gpio->da9052->dev->platform_data;
+	pdata = dev_get_platdata(gpio->da9052->dev);
 
 	gpio->gp = reference_gp;
 	if (pdata && pdata->gpio_base)