scsi: mpi3mr: Fix W=1 compilation warnings

Fix W=1 compilation warnings.

Signed-off-by: Ranjan Kumar <ranjan.kumar@broadcom.com>
Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Link: https://lore.kernel.org/r/20230316110209.60145-7-ranjan.kumar@broadcom.com


Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>