This change allows to decode respective functions in isp(4) in target mode
and pass them through CAM to CTL. Unfortunately neither CAM nor isp(4)
support returning response info for those task management functions now.
On the other side I just have no initiator to test this functionality.
Include PPR option bits defined in SPI4.
scsi_iu.h:
Add data structures releated to parallel SCSI information units
for use in SPI4 packetized protocol.
Clean up the comments related to the high speed
sync rate table for SPI.
scsi_message.h:
Bring in some SCSI3 message terminology. All SCSI2 names
are still preserved for backwards compatibility.
