rtc: vt8500: 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/20230304133028.2135435-39-u.kleine-koenig@pengutronix.de
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: Uwe Kleine-König

drivers/rtc/rtc-vt8500.c

@@ -235,14 +235,12 @@ static int vt8500_rtc_probe(struct platform_device *pdev)
 	return devm_rtc_register_device(vt8500_rtc->rtc);
 }
 
-static int vt8500_rtc_remove(struct platform_device *pdev)
+static void vt8500_rtc_remove(struct platform_device *pdev)
 {
 	struct vt8500_rtc *vt8500_rtc = platform_get_drvdata(pdev);
 
 	/* Disable alarm matching */
 	writel(0, vt8500_rtc->regbase + VT8500_RTC_IS);
-
-	return 0;
 }
 
 static const struct of_device_id wmt_dt_ids[] = {
@@ -253,7 +251,7 @@ MODULE_DEVICE_TABLE(of, wmt_dt_ids);
 
 static struct platform_driver vt8500_rtc_driver = {
 	.probe		= vt8500_rtc_probe,
-	.remove		= vt8500_rtc_remove,
+	.remove_new	= vt8500_rtc_remove,
 	.driver		= {
 		.name	= "vt8500-rtc",
 		.of_match_table = wmt_dt_ids,