hwmon: axi-fan: don't use driver_override as IRQ name

Do not use driver_override as IRQ name, as it is not guaranteed to point
to a valid string; use NULL instead (which makes the devm IRQ helpers
use dev_name()).

Fixes: 8412b410fa5e ("hwmon: Support ADI Fan Control IP")
Reviewed-by: Nuno Sá <[e-mail]>
Acked-by: Guenter Roeck <[e-mail]>
Reviewed-by: Greg Kroah-Hartman <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Danilo Krummrich <[e-mail]>

drivers/hwmon/axi-fan-control.c

···
 	ret = devm_request_threaded_irq(&pdev->dev, ctl->irq, NULL,
 					axi_fan_control_irq_handler,
 					IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
-					pdev->driver_override, ctl);
+					NULL, ctl);
 	if (ret)
 		return dev_err_probe(&pdev->dev, ret,
 				     "failed to request an irq\n");