watchdog: riowd: 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 <[e-mail]>
Reviewed-by: Guenter Roeck <[e-mail]>
Signed-off-by: Wim Van Sebroeck <[e-mail]>

drivers/watchdog/riowd.c

···
 	pr_info("Hardware watchdog [%i minutes], regs at %p\n",
 		riowd_timeout, p->regs);
 
-	dev_set_drvdata(&op->dev, p);
+	platform_set_drvdata(op, p);
 	return 0;
 
 out_iounmap:
···
 
 static int riowd_remove(struct platform_device *op)
 {
-	struct riowd *p = dev_get_drvdata(&op->dev);
+	struct riowd *p = platform_get_drvdata(op);
 
 	misc_deregister(&riowd_miscdev);
 	of_iounmap(&op->resource[0], p->regs, 2);