scsi: mpi3mr: Fix flushing !WQ_MEM_RECLAIM events warning

Fix the following warning by not allocating driver's event handling worker
queue with WQ_MEM_RECLAIM flag enabled:

workqueue: WQ_MEM_RECLAIM
mpi3mr_fwevt_worker [mpi3mr] is flushing !WQ_MEM_RECLAIM events

Link: https://lore.kernel.org/r/20220218180515.27455-1-sreekanth.reddy@broadcom.com


Signed-off-by: Sreekanth Reddy <sreekanth.reddy@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>