RA_IRQ_USB
sc->sc_ih = ra_intr_establish(RA_IRQ_USB, ehci_intr, sc, 1);
RA_IRQ_USB);
[RA_IRQ_USB] = "intc usb",
[RA_IRQ_USB] = INT_USB,
[INT_USB] = RA_IRQ_USB,
sc->sc_ih = ra_intr_establish(RA_IRQ_USB, ohci_intr, sc, 0);
RA_IRQ_USB);