staging: nvec_power: Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is (mostly) ignored
and this typically results in resource leaks. To improve here there is a
quest to make the remove callback return void. In the first step of this
quest all drivers are converted to .remove_new() which already returns
void.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230403154014.2564054-21-u.kleine-koenig@pengutronix.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/nvec/nvec_power.c

@@ -416,7 +416,7 @@ static int nvec_power_probe(struct platform_device *pdev)
 	return PTR_ERR_OR_ZERO(*psy);
 }
 
-static int nvec_power_remove(struct platform_device *pdev)
+static void nvec_power_remove(struct platform_device *pdev)
 {
 	struct nvec_power *power = platform_get_drvdata(pdev);
 
@@ -429,13 +429,11 @@ static int nvec_power_remove(struct platform_device *pdev)
 	case BAT:
 		power_supply_unregister(nvec_bat_psy);
 	}
-
-	return 0;
 }
 
 static struct platform_driver nvec_power_driver = {
 	.probe = nvec_power_probe,
-	.remove = nvec_power_remove,
+	.remove_new = nvec_power_remove,
 	.driver = {
 		   .name = "nvec-power",
 	}