bus. Without this, cbiiisc used to hang if nothing was connected.
Reported by Matthias Scheler. A similar method to avoid this was suggested
by Ralph Schmidt.
siop2.c. Add wide negotiation and Ultra support. Modify siop.c to match
the siop2.c sync negotiation changes. The CyberStorm MKIII driver now
supports 15 targets. Remove some old table-driven sync rate stuff from
the original Zeus driver.