scsi: qla2xxx: Use constant when it is known

Directly return constant when it is known to make code easier to
understand.

Link: https://lore.kernel.org/r/20200921112340.GA19336@duo.ucw.czReviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_nvme.c

@@ -542,7 +542,7 @@ static int qla_nvme_post_cmd(struct nvme_fc_local_port *lport,
 	fc_port_t *fcport;
 	struct srb_iocb *nvme;
 	struct scsi_qla_host *vha;
-	int rval = -ENODEV;
+	int rval;
 	srb_t *sp;
 	struct qla_qpair *qpair = hw_queue_handle;
 	struct nvme_private *priv = fd->private;
@@ -550,14 +550,14 @@ static int qla_nvme_post_cmd(struct nvme_fc_local_port *lport,
 
 	if (!priv) {
 		/* nvme association has been torn down */
-		return rval;
+		return -ENODEV;
 	}
 
 	fcport = qla_rport->fcport;
 
 	if (!qpair || !fcport || (qpair && !qpair->fw_started) ||
 	    (fcport && fcport->deleted))
-		return rval;
+		return -ENODEV;
 
 	vha = fcport->vha;