mcclock_ioasic_attach
static void mcclock_ioasic_attach(device_t, device_t, void *);
mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL);
static void mcclock_ioasic_attach(device_t, device_t, void *);
mcclock_ioasic_match, mcclock_ioasic_attach, NULL, NULL);