EDAC/mpc85xx: 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/20231004131254.2673842-11-u.kleine-koenig@pengutronix.de

drivers/edac/mpc85xx_edac.c

@@ -300,7 +300,7 @@ static int mpc85xx_pci_err_probe(struct platform_device *op)
 	return res;
 }
 
-static int mpc85xx_pci_err_remove(struct platform_device *op)
+static void mpc85xx_pci_err_remove(struct platform_device *op)
 {
 	struct edac_pci_ctl_info *pci = dev_get_drvdata(&op->dev);
 	struct mpc85xx_pci_pdata *pdata = pci->pvt_info;
@@ -312,8 +312,6 @@ static int mpc85xx_pci_err_remove(struct platform_device *op)
 
 	edac_pci_del_device(&op->dev);
 	edac_pci_free_ctl_info(pci);
-
-	return 0;
 }
 
 static const struct platform_device_id mpc85xx_pci_err_match[] = {
@@ -325,7 +323,7 @@ static const struct platform_device_id mpc85xx_pci_err_match[] = {
 
 static struct platform_driver mpc85xx_pci_err_driver = {
 	.probe = mpc85xx_pci_err_probe,
-	.remove = mpc85xx_pci_err_remove,
+	.remove_new = mpc85xx_pci_err_remove,
 	.id_table = mpc85xx_pci_err_match,
 	.driver = {
 		.name = "mpc85xx_pci_err",
@@ -591,7 +589,7 @@ static int mpc85xx_l2_err_probe(struct platform_device *op)
 	return res;
 }
 
-static int mpc85xx_l2_err_remove(struct platform_device *op)
+static void mpc85xx_l2_err_remove(struct platform_device *op)
 {
 	struct edac_device_ctl_info *edac_dev = dev_get_drvdata(&op->dev);
 	struct mpc85xx_l2_pdata *pdata = edac_dev->pvt_info;
@@ -606,7 +604,6 @@ static int mpc85xx_l2_err_remove(struct platform_device *op)
 	out_be32(pdata->l2_vbase + MPC85XX_L2_ERRDIS, orig_l2_err_disable);
 	edac_device_del_device(&op->dev);
 	edac_device_free_ctl_info(edac_dev);
-	return 0;
 }
 
 static const struct of_device_id mpc85xx_l2_err_of_match[] = {
@@ -630,7 +627,7 @@ MODULE_DEVICE_TABLE(of, mpc85xx_l2_err_of_match);
 
 static struct platform_driver mpc85xx_l2_err_driver = {
 	.probe = mpc85xx_l2_err_probe,
-	.remove = mpc85xx_l2_err_remove,
+	.remove_new = mpc85xx_l2_err_remove,
 	.driver = {
 		.name = "mpc85xx_l2_err",
 		.of_match_table = mpc85xx_l2_err_of_match,