sbus_intr
struct sbus_intr **, int *, int);
struct sbus_intr *sbi = &sa->sa_intr[i];
sbus_get_intr(struct sbus_softc *sc, int node, struct sbus_intr **ipp, int *np,
struct sbus_intr *ip;
ip = mallocarray(*np, sizeof(struct sbus_intr), M_DEVBUF,
struct sbus_intr *sc_intr; /* interrupt info */
struct sbus_intr *sa_intr; /* SBus interrupts for device */