SMP passthrough support for CAM and mps(4)

[Matthew Jacob]

+ there are other, non-SMP things included (CAM_DIR_RESV -> CAM_DIR_BOTH)

+ CAM_QUIRK_NOSERIAL got replaced with CAM_QUIRK_NOVPDS, fine

+ XPT_DEV_ADVINFO ought have a comment about what it is like the other 
commands. The pp below about advanced device info is hard to figure out.


+ The functions in smp_all.c should make clear distinctions about which 
version of SAS is being supported.



I would really like to see this come in as a fully functional  PROTO_SMP 
in cam_proto. Any chance of that happening?