dmaengine: txx9dmac: 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() is 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>
Link: https://lore.kernel.org/r/20230919133207.1400430-55-u.kleine-koenig@pengutronix.deSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/txx9dmac.c

@@ -1151,7 +1151,7 @@ static int __init txx9dmac_chan_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int txx9dmac_chan_remove(struct platform_device *pdev)
+static void txx9dmac_chan_remove(struct platform_device *pdev)
 {
 	struct txx9dmac_chan *dc = platform_get_drvdata(pdev);
 
@@ -1162,7 +1162,6 @@ static int txx9dmac_chan_remove(struct platform_device *pdev)
 		tasklet_kill(&dc->tasklet);
 	}
 	dc->ddev->chan[pdev->id % TXX9_DMA_MAX_NR_CHANNELS] = NULL;
-	return 0;
 }
 
 static int __init txx9dmac_probe(struct platform_device *pdev)
@@ -1215,7 +1214,7 @@ static int __init txx9dmac_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int txx9dmac_remove(struct platform_device *pdev)
+static void txx9dmac_remove(struct platform_device *pdev)
 {
 	struct txx9dmac_dev *ddev = platform_get_drvdata(pdev);
 
@@ -1224,7 +1223,6 @@ static int txx9dmac_remove(struct platform_device *pdev)
 		devm_free_irq(&pdev->dev, ddev->irq, ddev);
 		tasklet_kill(&ddev->tasklet);
 	}
-	return 0;
 }
 
 static void txx9dmac_shutdown(struct platform_device *pdev)
@@ -1262,14 +1260,14 @@ static const struct dev_pm_ops txx9dmac_dev_pm_ops = {
 };
 
 static struct platform_driver txx9dmac_chan_driver = {
-	.remove		= txx9dmac_chan_remove,
+	.remove_new	= txx9dmac_chan_remove,
 	.driver = {
 		.name	= "txx9dmac-chan",
 	},
 };
 
 static struct platform_driver txx9dmac_driver = {
-	.remove		= txx9dmac_remove,
+	.remove_new	= txx9dmac_remove,
 	.shutdown	= txx9dmac_shutdown,
 	.driver = {
 		.name	= "txx9dmac",