EDAC/armada_xp: 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 ignored (apart
from emitting a warning) 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. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

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>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231004131254.2673842-3-u.kleine-koenig@pengutronix.de

drivers/edac/armada_xp_edac.c

@@ -351,20 +351,18 @@ static int axp_mc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int axp_mc_remove(struct platform_device *pdev)
+static void axp_mc_remove(struct platform_device *pdev)
 {
 	struct mem_ctl_info *mci = platform_get_drvdata(pdev);
 
 	edac_mc_del_mc(&pdev->dev);
 	edac_mc_free(mci);
 	platform_set_drvdata(pdev, NULL);
-
-	return 0;
 }
 
 static struct platform_driver axp_mc_driver = {
 	.probe = axp_mc_probe,
-	.remove = axp_mc_remove,
+	.remove_new = axp_mc_remove,
 	.driver = {
 		.name = "armada_xp_mc_edac",
 		.of_match_table = of_match_ptr(axp_mc_of_match),
@@ -564,7 +562,7 @@ static int aurora_l2_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int aurora_l2_remove(struct platform_device *pdev)
+static void aurora_l2_remove(struct platform_device *pdev)
 {
 	struct edac_device_ctl_info *dci = platform_get_drvdata(pdev);
 #ifdef CONFIG_EDAC_DEBUG
@@ -575,13 +573,11 @@ static int aurora_l2_remove(struct platform_device *pdev)
 	edac_device_del_device(&pdev->dev);
 	edac_device_free_ctl_info(dci);
 	platform_set_drvdata(pdev, NULL);
-
-	return 0;
 }
 
 static struct platform_driver aurora_l2_driver = {
 	.probe = aurora_l2_probe,
-	.remove = aurora_l2_remove,
+	.remove_new = aurora_l2_remove,
 	.driver = {
 		.name = "aurora_l2_edac",
 		.of_match_table = of_match_ptr(aurora_l2_of_match),