uhub_find_iface_index
uhub_find_iface_index(hub, child, &res);
uhub_find_iface_index(hub, child, &res);
uhub_find_iface_index(hub, child, &res);
uhub_find_iface_index(sc->usc.sc_udev->hub, child, &hres);
uhub_find_iface_index(struct usb_hub *hub, device_t child,