[PATCH] Stop pmac_zilog from abusing 8250's device numbers.

[Alan Cox]

> One option would be to move the 8250-based serial ports, to, say, 
> /dev/ttyN* (for National Semiconductors -- the best I could come up 
> with) and redefine /dev/ttyS* as a serial port multiplexer which maps in 
> all the types, for the ones that really want dynamic mapping.

I think this makes it worse than simply starting the 8250 ports at a
platform specific minor offset.

Alan