intc_intr_disestablish
intc_intr_establish, intc_intr_disestablish, intc_intr_string,
intc_intr_disestablish(ih);
void intc_intr_disestablish(void *cookie);
intc_intr_disestablish(eih->eih_func);
void intc_intr_disestablish(void *);