scsi: qla2xxx: Change a stack variable into a static const variable

Make qla2x00_get_host_fabric_name() slightly faster by changing a stack
array into a static array. Declare that array const now that the
wwn_to_u64() argument pointer has been declared const.

Cc: Himanshu Madhani <hmadhani@marvell.com>
Cc: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_attr.c

@@ -2723,8 +2723,9 @@ static void
 qla2x00_get_host_fabric_name(struct Scsi_Host *shost)
 {
 	scsi_qla_host_t *vha = shost_priv(shost);
-	uint8_t node_name[WWN_SIZE] = { 0xFF, 0xFF, 0xFF, 0xFF, \
-		0xFF, 0xFF, 0xFF, 0xFF};
+	static const uint8_t node_name[WWN_SIZE] = {
+		0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
+	};
 	u64 fabric_name = wwn_to_u64(node_name);
 
 	if (vha->device_flags & SWITCH_FOUND)