fdc_isa_attach
static void fdc_isa_attach (device_t, device_t, void *);
fdc_isa_probe, fdc_isa_attach, NULL, NULL);
static void fdc_isa_attach(device_t, device_t, void *);
fdc_isa_probe, fdc_isa_attach, fdc_isa_detach, NULL, NULL, fdc_childdet);