sio.c depends on "struct tty" which was changed

Hi,

Tried to buildkernel with "device sio", it reported errors like "struct 
tty doesn't have memeber t_init_in" and etc. on code block in sio.c:

    tp->t_init_in.c_ispeed  = tp->t_init_in.c_ospeed =
    tp->t_lock_in.c_ispeed  = tp->t_lock_in.c_ospeed =
    tp->t_init_out.c_ispeed = tp->t_init_out.c_ospeed =
    tp->t_lock_out.c_ispeed = tp->t_lock_out.c_ospeed = comdefaultrate;

Tty actually doesn't have it and seems "sio" in't suported anymore. If 
so, does it make sense to remove support of "device sio" from current at 
all?

Thanks,
Vlad Kuzmin