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-timberdale.c b/drivers/gpio/gpio-timberdale.c
index 4c65f88..7a0e956 100644
--- a/drivers/gpio/gpio-timberdale.c
+++ b/drivers/gpio/gpio-timberdale.c
@@ -227,7 +227,7 @@
 	struct gpio_chip *gc;
 	struct timbgpio *tgpio;
 	struct resource *iomem;
-	struct timbgpio_platform_data *pdata = pdev->dev.platform_data;
+	struct timbgpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	int irq = platform_get_irq(pdev, 0);
 
 	if (!pdata || pdata->nr_pins > 32) {
@@ -318,7 +318,7 @@
 static int timbgpio_remove(struct platform_device *pdev)
 {
 	int err;
-	struct timbgpio_platform_data *pdata = pdev->dev.platform_data;
+	struct timbgpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct timbgpio *tgpio = platform_get_drvdata(pdev);
 	struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	int irq = platform_get_irq(pdev, 0);