usb: gadget: regression fix - usage of usb_ep

This patch removes redundant pointer to struct usb_endpoint_descriptor which
were missed in commit 79149b8b:

 usb: gadget: Update fsl_udc_core to use usb_endpoint_descriptor inside the
 struct usb_ep

Due to clock framework regressions, this patch is only compile tested!
Signed-off-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/fsl_udc_core.c

@@ -2575,7 +2575,7 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
 	/* for ep0: the desc defined here;
 	 * for other eps, gadget layer called ep_enable with defined desc
 	 */
-	udc_controller->eps[0].desc = &fsl_ep0_desc;
+	udc_controller->eps[0].ep.desc = &fsl_ep0_desc;
 	udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
 
 	/* setup the udc->eps[] for non-control endpoints and link

drivers/usb/gadget/fsl_usb2_udc.h

@@ -568,10 +568,10 @@ static void dump_msg(const char *label, const u8 * buf, unsigned int length)
 /*
  * ### internal used help routines.
  */
-#define ep_index(EP)		((EP)->desc->bEndpointAddress&0xF)
+#define ep_index(EP)		((EP)->ep.desc->bEndpointAddress&0xF)
 #define ep_maxpacket(EP)	((EP)->ep.maxpacket)
 #define ep_is_in(EP)	( (ep_index(EP) == 0) ? (EP->udc->ep0_dir == \
-			USB_DIR_IN ):((EP)->desc->bEndpointAddress \
+			USB_DIR_IN) : ((EP)->ep.desc->bEndpointAddress \
 			& USB_DIR_IN)==USB_DIR_IN)
 #define get_ep_by_pipe(udc, pipe)	((pipe == 1)? &udc->eps[0]: \
 					&udc->eps[pipe])