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-ich.c b/drivers/gpio/gpio-ich.c
index 2729e3d..814addb 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -354,7 +354,7 @@
 {
 	struct resource *res_base, *res_pm;
 	int err;
-	struct lpc_ich_info *ich_info = pdev->dev.platform_data;
+	struct lpc_ich_info *ich_info = dev_get_platdata(&pdev->dev);
 
 	if (!ich_info)
 		return -ENODEV;