MUSB2_REG_INTUSB
usb_status = MUSB2_READ_1(sc, MUSB2_REG_INTUSB);
REGDECL(MUSB2_REG_INTUSB, 0x004c),
intusb = MUSB2_READ_1(&sc->sc, MUSB2_REG_INTUSB);
MUSB2_WRITE_1(&sc->sc, MUSB2_REG_INTUSB, intusb);