Shark is broken

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

Hello,

I just noticed that dyoung's bus_space rototill left shark broken - no 
bus_defs.h or bus_funcs.h
Shark does have an unsupported ( and almost always unused ) PCI slot though ;)
Either way, its own bus_space is weird as it is ( it operates only on kernel 
virtual addresses which makes implementing bus_space_mmap() painful so the MD 
backends for chipsfb and igsfb have to fake their own ) - might be worth fixing 
that as well while there.

have fun
Michael