scsi: ibmvfc: don't check for failure from mempool_alloc()

mempool_alloc() cannot fail when passed GFP_NOIO or any other gfp
setting that is permitted to sleep.  So remove this pointless code.
Signed-off-by: NeilBrown <neilb@suse.com>
Acked-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ibmvscsi/ibmvfc.c

@@ -3910,12 +3910,6 @@ static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
 	spin_unlock_irqrestore(vhost->host->host_lock, flags);
 
 	tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
-	if (!tgt) {
-		dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
-			scsi_id);
-		return -ENOMEM;
-	}
-
 	memset(tgt, 0, sizeof(*tgt));
 	tgt->scsi_id = scsi_id;
 	tgt->new_scsi_id = scsi_id;