scsi: qla2xxx: Fix a locking imbalance in qlt_24xx_handle_els()

Ensure that upon return the tgt->ha->tgt.sess_lock spin lock is unlocked
no matter which code path is taken through this function.  This was
detected by sparse.

Fixes: 82abdcaf ("scsi: qla2xxx: Allow target mode to accept PRLI in dual mode")
Signed-off-by: NBart Van Assche <bart.vanassche@wdc.com>
Cc: Himanshu Madhani <himanshu.madhani@cavium.com>
Cc: Quinn Tran <quinn.tran@cavium.com>
Acked-by: NHimanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_target.c

@@ -4871,8 +4871,6 @@ static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
 				    sess);
 				qlt_send_term_imm_notif(vha, iocb, 1);
 				res = 0;
-				spin_lock_irqsave(&tgt->ha->tgt.sess_lock,
-				    flags);
 				break;
 			}