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.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>