watchdog: mv64x60_wdt: use devm_ioremap()

Use devm_ioremap() to make cleanup paths simpler.

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/mv64x60_wdt.c

@@ -276,7 +276,7 @@ static int mv64x60_wdt_probe(struct platform_device *dev)
 	if (!r)
 		return -ENODEV;
 
-	mv64x60_wdt_regs = ioremap(r->start, resource_size(r));
+	mv64x60_wdt_regs = devm_ioremap(&dev->dev, r->start, resource_size(r));
 	if (mv64x60_wdt_regs == NULL)
 		return -ENOMEM;
 
@@ -293,8 +293,6 @@ static int mv64x60_wdt_remove(struct platform_device *dev)
 
 	mv64x60_wdt_handler_disable();
 
-	iounmap(mv64x60_wdt_regs);
-
 	return 0;
 }