leds: leds-cobalt-raq.c - use resource_size()

Use resource_size() for ioremap.

Signed-off-by: H Hartley Sweeten <[e-mail]>
Signed-off-by: Richard Purdie <[e-mail]>

drivers/leds/leds-cobalt-raq.c

···
 	if (!res)
 		return -EBUSY;
 
-	led_port = ioremap(res->start, res->end - res->start + 1);
+	led_port = ioremap(res->start, resource_size(res));
 	if (!led_port)
 		return -ENOMEM;