platform/mellanox: mlxreg-hotplug: Revert "move to use request_irq by IRQF_NO_AUTOEN flag"

It causes mlxreg-hotplug probing failure: request_threaded_irq()
returns -EINVAL due to true value of condition:
((irqflags & IRQF_SHARED) && (irqflags & IRQF_NO_AUTOEN))
after flag "IRQF_NO_AUTOEN" has been added to:
err = devm_request_irq(&pdev->dev, priv->irq,
mlxreg_hotplug_irq_handler, IRQF_TRIGGER_FALLING
| IRQF_SHARED | IRQF_NO_AUTOEN,
"mlxreg-hotplug", priv);

This reverts commit bee3ecfed0fc ("platform/mellanox: mlxreg-hotplug: move
to use request_irq by IRQF_NO_AUTOEN flag").

Signed-off-by: Mykola Kostenok <[e-mail]>
Acked-by: Vadim Pasternak <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Hans de Goede <[e-mail]>

drivers/platform/mellanox/mlxreg-hotplug.c

···
 
 	err = devm_request_irq(&pdev->dev, priv->irq,
 			       mlxreg_hotplug_irq_handler, IRQF_TRIGGER_FALLING
-			       | IRQF_SHARED | IRQF_NO_AUTOEN,
-			       "mlxreg-hotplug", priv);
+			       | IRQF_SHARED, "mlxreg-hotplug", priv);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to request irq: %d\n", err);
 		return err;
 	}
 
+	disable_irq(priv->irq);
 	spin_lock_init(&priv->lock);
 	INIT_DELAYED_WORK(&priv->dwork_irq, mlxreg_hotplug_work_handler);
 	dev_set_drvdata(&pdev->dev, priv);