power: pm2301_charger: Remove deprecated create_singlethread_workqueue

alloc_ordered_workqueue() with WQ_MEM_RECLAIM set replaces
deprecated create_singlethread_workqueue(). This is the identity
conversion.

The workqueue "charger_wq" is used for running all the charger related
tasks. This involves charger detection, checking for HW failure and HW
status. This workqueue has been identity converted.

It queues multiple workitems viz &pm2->check_main_thermal_prot_work,
&pm2->check_hw_failure_work, &pm2->ac_work. Hence, the deprecated
create_singlethread_workqueue() instance has been replaced with a
dedicated ordered workqueue.

The WQ_MEM_RECLAIM flag has been set to ensure forward progress under
memory pressure.
Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>

drivers/power/supply/pm2301_charger.c

@@ -1054,7 +1054,8 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
 	pm2->ac_chg.external = true;
 
 	/* Create a work queue for the charger */
-	pm2->charger_wq = create_singlethread_workqueue("pm2xxx_charger_wq");
+	pm2->charger_wq = alloc_ordered_workqueue("pm2xxx_charger_wq",
+						  WQ_MEM_RECLAIM);
 	if (pm2->charger_wq == NULL) {
 		ret = -ENOMEM;
 		dev_err(pm2->dev, "failed to create work queue\n");