scsi: qla2xxx: Refer directly to the qla2xxx_driver_template

Access the qla2xxx_driver_template data structure directly instead of via
the host pointer. This patch prepares for declaring the 'hostt' pointer
const.

Cc: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20230322195515.1267197-2-bvanassche@acm.orgSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_target.c

@@ -6395,8 +6395,7 @@ int qlt_add_target(struct qla_hw_data *ha, struct scsi_qla_host *base_vha)
 		return -ENOMEM;
 	}
 
-	if (!(base_vha->host->hostt->supported_mode & MODE_TARGET))
-		base_vha->host->hostt->supported_mode |= MODE_TARGET;
+	qla2xxx_driver_template.supported_mode |= MODE_TARGET;
 
 	rc = btree_init64(&tgt->lun_qpair_map);
 	if (rc) {