scsi: mpi3mr: Use the proper SCSI midlayer interfaces for PI

Use the SCSI midlayer interfaces to query protection interval, reference
tag, and per-command DIX flags

Link: https://lore.kernel.org/r/20210806040023.5355-4-martin.petersen@oracle.com


Cc: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Acked-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>