Round 2 of the clean-ups - AT vs. PS/2 KBC is now decided based on machine flags, reduces the chances of mismatch to zero.

src/sio/sio_it86x1f.c

@@ -856,7 +856,7 @@ it86x1f_init(UNUSED(const device_t *info))
     io_sethandler(0x279, 1, NULL, NULL, NULL, it86x1f_write_unlock, NULL, NULL, dev);
 
     if (info->local == ITE_IT8671F)
-        device_add_params(&kbc_ps2_ami_device, (void *) 0x00004800);
+        device_add_params(&kbc_at_ami_device, (void *) 0x00004800);
 
     it86x1f_reset(dev);