Testers needed

[Michael <macallan%netbsd.org@localhost>]

Hello,

in order to avoid multiple mappings of mac-io's register space in  
different drivers ( a problem noticed by Marco Trillo ) I added access  
functions to obio.c and converted snapper, bm and wi at obio to use  
them. Snapper and bm should Just Work(tm) as before, wi should work  
again unless I made a typo somewhere.

Again, anyone using any of the the
- snapper
- bm
- wi at obio
drivers on -current please update arch/macppc, rebuild and report  
success or failure.

have fun
Michael