watchdog: wm831x: use platform_{get,set}_drvdata()

Use the wrapper functions for getting and setting the driver data using
platform_device instead of using dev_{get,set}_drvdata() with &pdev->dev,
so we can directly pass a struct platform_device.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

drivers/watchdog/wm831x_wdt.c

@@ -282,7 +282,7 @@ static int wm831x_wdt_probe(struct platform_device *pdev)
 		goto err;
 	}
 
-	dev_set_drvdata(&pdev->dev, driver_data);
+	platform_set_drvdata(pdev, driver_data);
 
 	return 0;
 
@@ -292,7 +292,7 @@ static int wm831x_wdt_probe(struct platform_device *pdev)
 
 static int wm831x_wdt_remove(struct platform_device *pdev)
 {
-	struct wm831x_wdt_drvdata *driver_data = dev_get_drvdata(&pdev->dev);
+	struct wm831x_wdt_drvdata *driver_data = platform_get_drvdata(pdev);
 
 	watchdog_unregister_device(&driver_data->wdt);