MFC r197080
MFC r197080

Add a few SCSI controllers to GENERIC that can be found in Powermacs.
This allows installation onto SCSI disks as shipped, for example,
as an option with the Powermac G3.

PR:		powerpc/138543
Reviewed by:	grehan
Approved by:	re (kib)
Obtained from:	sparc64

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase