usb: xhci-mtk: use clear type instead of void

Use struct usb_host_endpoint instead of void to declare
the member @ep of mu3h_sch_ep_info struct.
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/e9790eb4b959f9f843433fa5048c76772cc59061.1615170625.git.chunfeng.yun@mediatek.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-mtk.h

@@ -84,7 +84,7 @@ struct mu3h_sch_ep_info {
 	struct mu3h_sch_tt *sch_tt;
 	u32 ep_type;
 	u32 maxpkt;
-	void *ep;
+	struct usb_host_endpoint *ep;
 	bool allocated;
 	/*
 	 * mtk xHCI scheduling information put into reserved DWs