usb/core/driver: fix warning

usb/core/driver: fix warning:
drivers/usb/core/driver.c:834: warning: 'do_unbind_rebind' defined but not used

Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/core/driver.c

@@ -774,6 +774,7 @@ void usb_deregister(struct usb_driver *driver)
 }
 EXPORT_SYMBOL_GPL(usb_deregister);
 
+#ifdef CONFIG_PM
 
 /* Forced unbinding of a USB interface driver, either because
  * it doesn't support pre_reset/post_reset/reset_resume or
@@ -872,8 +873,6 @@ static void do_unbind_rebind(struct usb_device *udev, int action)
 	}
 }
 
-#ifdef CONFIG_PM
-
 /* Caller has locked udev's pm_mutex */
 static int usb_suspend_device(struct usb_device *udev, pm_message_t msg)
 {