[SCSI] Include protection operation in SCSI command trace

When debugging DIF/DIX it is very helpful to be able to see which DIX
operation is associated with the scsi_cmnd. Include the protection op in
the SCSI command trace.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 8d4ef8e..e531acf 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1062,6 +1062,7 @@
 	cmd->request = req;
 
 	cmd->cmnd = req->cmd;
+	cmd->prot_op = SCSI_PROT_NORMAL;
 
 	return cmd;
 }