cb_remove_xintr
int r = cb_remove_xintr(pci_p, dip, rdip, ino, mondo);
extern int cb_remove_xintr(pcmu_t *, dev_info_t *, dev_info_t *,
extern int cb_remove_xintr(pci_t *pci_p, dev_info_t *dip, dev_info_t *rdip,