power: ipaq_micro_battery: Remove deprecated create_singlethread_workqueue

The workqueue "wq" is used for handling battery related tasks.

It has a single work item viz &mb->update and hence it doesn't require
execution ordering. Hence, alloc_workqueue has been used to replace the
deprecated create_singlethread_workqueue instance.

The WQ_MEM_RECLAIM flag has been set to ensure forward progress under
memory pressure.

Since there is a single work item, explicit concurrency
limit is unnecessary here.
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/supply/ipaq_micro_battery.c

@@ -235,7 +235,7 @@ static int micro_batt_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	mb->micro = dev_get_drvdata(pdev->dev.parent);
-	mb->wq = create_singlethread_workqueue("ipaq-battery-wq");
+	mb->wq = alloc_workqueue("ipaq-battery-wq", WQ_MEM_RECLAIM, 0);
 	if (!mb->wq)
 		return -ENOMEM;