IB/nes: Remove deprecated create_singlethread_workqueue

alloc_ordered_workqueue() replaces deprecated
create_singlethread_workqueue().

The workqueue "event_wq" queues work item &event->event_work and the
workqueue "disconn_wq" queues work item work (maps to
g_cm_core->disconn_wq).

WQ_MEM_RECLAIM has not been set since the workqueues are not being used
on a memory reclaim path.
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/hw/nes/nes_cm.c

@@ -2692,12 +2692,12 @@ static struct nes_cm_core *nes_cm_alloc_core(void)
 	nes_debug(NES_DBG_CM, "Init CM Core completed -- cm_core=%p\n", cm_core);
 
 	nes_debug(NES_DBG_CM, "Enable QUEUE EVENTS\n");
-	cm_core->event_wq = create_singlethread_workqueue("nesewq");
+	cm_core->event_wq = alloc_ordered_workqueue("nesewq", 0);
 	if (!cm_core->event_wq)
 		goto out_free_cmcore;
 	cm_core->post_event = nes_cm_post_event;
 	nes_debug(NES_DBG_CM, "Enable QUEUE DISCONNECTS\n");
-	cm_core->disconn_wq = create_singlethread_workqueue("nesdwq");
+	cm_core->disconn_wq = alloc_ordered_workqueue("nesdwq", 0);
 	if (!cm_core->disconn_wq)
 		goto out_free_wq;