mtd: hyperbus: hbmc-am654: Convert to platform remove callback returning void

[ Upstream commit 59bd56760d ]

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: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/linux-mtd/20231008200143.196369-10-u.kleine-koenig@pengutronix.de
Stable-dep-of: bf5821909e ("mtd: hyperbus: hbmc-am654: fix an OF node reference leak")
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/mtd/hyperbus/hbmc-am654.c

@@ -229,7 +229,7 @@ disable_mux:
 	return ret;
 }
 
-static int am654_hbmc_remove(struct platform_device *pdev)
+static void am654_hbmc_remove(struct platform_device *pdev)
 {
 	struct am654_hbmc_priv *priv = platform_get_drvdata(pdev);
 	struct am654_hbmc_device_priv *dev_priv = priv->hbdev.priv;
@@ -241,8 +241,6 @@ static int am654_hbmc_remove(struct platform_device *pdev)
 
 	if (dev_priv->rx_chan)
 		dma_release_channel(dev_priv->rx_chan);
-
-	return 0;
 }
 
 static const struct of_device_id am654_hbmc_dt_ids[] = {
@@ -256,7 +254,7 @@ MODULE_DEVICE_TABLE(of, am654_hbmc_dt_ids);
 
 static struct platform_driver am654_hbmc_platform_driver = {
 	.probe = am654_hbmc_probe,
-	.remove = am654_hbmc_remove,
+	.remove_new = am654_hbmc_remove,
 	.driver = {
 		.name = "hbmc-am654",
 		.of_match_table = am654_hbmc_dt_ids,