usb: cdns3: gadget: reset EP_CLAIMED flag while unloading

EP_CLAIMED flag is used to track the claimed endpoints. While unloading the
module, Reset EP_CLAIMED flag for all enabled endpoints. So that it can be
reused.
Signed-off-by: NSanket Parmar <sparmar@cadence.com>
Acked-by: NPeter Chen <peter.chen@nxp.com>
Reviewed-by: NRoger Quadros <rogerq@ti.com>
Acked-by: NFelipe Balbi <balbi@kernel.org>
Link: https://lore.kernel.org/r/20191029122441.5816-1-sparmar@cadence.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/cdns3/gadget.c

@@ -2379,6 +2379,8 @@ static int cdns3_gadget_udc_stop(struct usb_gadget *gadget)
 		writel(EP_CMD_EPRST, &priv_dev->regs->ep_cmd);
 		readl_poll_timeout_atomic(&priv_dev->regs->ep_cmd, val,
 					  !(val & EP_CMD_EPRST), 1, 100);
+
+		priv_ep->flags &= ~EP_CLAIMED;
 	}
 
 	/* disable interrupt for device */