USB: core, devio: use to_usb_device

Use to_usb_device() instead of open-coding it.

Signed-off-by: Geliang Tang <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/core/devio.c

···
 			      (void *) (unsigned long) devt, match_devt);
 	if (!dev)
 		return NULL;
-	return container_of(dev, struct usb_device, dev);
+	return to_usb_device(dev);
 }
 
 /*

drivers/usb/core/usb.c

···
 	if (!is_usb_device(dev))
 		return 0;
 
-	return arg->fn(container_of(dev, struct usb_device, dev), arg->data);
+	return arg->fn(to_usb_device(dev), arg->data);
 }
 
 /**