hpsa: add sysfs entry path_info to show box and bay information

host no, bus, target, lun, scsi_device_type
for hba mode add: box and bay information

report if the path is active/inactive

Reviewed-by: Kevin Barnett <kevin.barnett@pmcs.com>
Reviewed-by: Scott Teel <scott.teel@pmcs.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Don Brace <don.brace@pmcs.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>