ibmvscsi driver - third version

This is the third version of the SCSI driver to support the adapter 
implemented by the IBM Power5 firmware.  I have incorporated all comments 
 from the previous submissions.  Probably the most significant functional 
change is that all locking is done with the host_lock now.

If anyone would prefer to review the code in a prettier c2html format, you 
can see it at
http://www-users.cs.umn.edu/~boutcher/ibmvscsi/

And there is a tarball at
ftp://ftp.cs.umn.edu/dept/users/boutcher/ibmvscsi-feb22b.tar.gz

Thanks,

Dave Boutcher