AXGE_N_TRANSFER
static const struct usb_config axge_config[AXGE_N_TRANSFER] = {
sc->sc_xfer, axge_config, AXGE_N_TRANSFER, sc, &sc->sc_mtx);
usbd_transfer_unsetup(sc->sc_xfer, AXGE_N_TRANSFER);
struct usb_xfer *sc_xfer[AXGE_N_TRANSFER];