usb: gadget: ci13xxx: fix ep list removal in gadget unregistering code

Since ep0{out,in} are never on gadget's ep_list, there's no need to try
to unlink them, even more so because ep_list linkage is not initialized
for these endpoints.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/ci13xxx_udc.c

@@ -2737,7 +2737,7 @@ static int ci13xxx_stop(struct usb_gadget_driver *driver)
 	for (i = 0; i < hw_ep_max; i++) {
 		struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
 
-		if (!list_empty(&mEp->ep.ep_list))
+		if (mEp->num)
 			list_del_init(&mEp->ep.ep_list);
 
 		if (mEp->qh.ptr != NULL)