usb: cdns3: remove set but not used variable 'priv_dev'

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/usb/cdns3/gadget.c: In function '__cdns3_gadget_init':
drivers/usb/cdns3/gadget.c:2665:23: warning:
 variable 'priv_dev' set but not used [-Wunused-but-set-variable]
drivers/usb/cdns3/gadget.c: In function cdns3_start_all_request:
drivers/usb/cdns3/gadget.c:357:24: warning:
 variable priv_req set but not used [-Wunused-but-set-variable]

They are never used, so can be removed.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190903120445.22204-1-yuehaibing@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/cdns3/gadget.c

@@ -354,13 +354,11 @@ enum usb_device_speed cdns3_get_speed(struct cdns3_device *priv_dev)
 static int cdns3_start_all_request(struct cdns3_device *priv_dev,
 				   struct cdns3_endpoint *priv_ep)
 {
-	struct cdns3_request *priv_req;
 	struct usb_request *request;
 	int ret = 0;
 
 	while (!list_empty(&priv_ep->deferred_req_list)) {
 		request = cdns3_next_request(&priv_ep->deferred_req_list);
-		priv_req = to_cdns3_request(request);
 
 		ret = cdns3_ep_run_transfer(priv_ep, request);
 		if (ret)
@@ -2664,7 +2662,6 @@ static int cdns3_gadget_start(struct cdns3 *cdns)
 
 static int __cdns3_gadget_init(struct cdns3 *cdns)
 {
-	struct cdns3_device *priv_dev;
 	int ret = 0;
 
 	cdns3_drd_switch_gadget(cdns, 1);
@@ -2674,8 +2671,6 @@ static int __cdns3_gadget_init(struct cdns3 *cdns)
 	if (ret)
 		return ret;
 
-	priv_dev = cdns->gadget_dev;
-
 	/*
 	 * Because interrupt line can be shared with other components in
 	 * driver it can't use IRQF_ONESHOT flag here.