drm/meson: 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 meson drm drivers from always returning zero in the
remove callback to the void returning variant.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230507162616.1368908-31-u.kleine-koenig@pengutronix.de

drivers/gpu/drm/meson/meson_drv.c

@@ -516,11 +516,9 @@ static int meson_drv_probe(struct platform_device *pdev)
 	return 0;
 };
 
-static int meson_drv_remove(struct platform_device *pdev)
+static void meson_drv_remove(struct platform_device *pdev)
 {
 	component_master_del(&pdev->dev, &meson_drv_master_ops);
-
-	return 0;
 }
 
 static struct meson_drm_match_data meson_drm_gxbb_data = {
@@ -560,7 +558,7 @@ static const struct dev_pm_ops meson_drv_pm_ops = {
 
 static struct platform_driver meson_drm_platform_driver = {
 	.probe      = meson_drv_probe,
-	.remove     = meson_drv_remove,
+	.remove_new = meson_drv_remove,
 	.shutdown   = meson_drv_shutdown,
 	.driver     = {
 		.name	= "meson-drm",

drivers/gpu/drm/meson/meson_dw_hdmi.c

@@ -852,11 +852,9 @@ static int meson_dw_hdmi_probe(struct platform_device *pdev)
 	return component_add(&pdev->dev, &meson_dw_hdmi_ops);
 }
 
-static int meson_dw_hdmi_remove(struct platform_device *pdev)
+static void meson_dw_hdmi_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &meson_dw_hdmi_ops);
-
-	return 0;
 }
 
 static const struct dev_pm_ops meson_dw_hdmi_pm_ops = {
@@ -879,7 +877,7 @@ MODULE_DEVICE_TABLE(of, meson_dw_hdmi_of_table);
 
 static struct platform_driver meson_dw_hdmi_platform_driver = {
 	.probe		= meson_dw_hdmi_probe,
-	.remove		= meson_dw_hdmi_remove,
+	.remove_new	= meson_dw_hdmi_remove,
 	.driver		= {
 		.name		= DRIVER_NAME,
 		.of_match_table	= meson_dw_hdmi_of_table,