scsi: hisi_sas: initialize dq spinlock before use

It is required to initialize the dq spinlock before use, which was not being
done, so fix it. This issue can be detected when CONFIG_DEBUG_SPINLOCK is
enabled.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/hisi_sas/hisi_sas_main.c

@@ -1657,6 +1657,7 @@ int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
 		cq->hisi_hba = hisi_hba;
 
 		/* Delivery queue structure */
+		spin_lock_init(&dq->lock);
 		dq->id = i;
 		dq->hisi_hba = hisi_hba;