dmaengine: fsl-qdma: 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/20230919133207.1400430-14-u.kleine-koenig@pengutronix.deSigned-off-by: Vinod Koul <vkoul@kernel.org>

drivers/dma/fsl-qdma.c

@@ -1266,7 +1266,7 @@ static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev)
 	}
 }
 
-static int fsl_qdma_remove(struct platform_device *pdev)
+static void fsl_qdma_remove(struct platform_device *pdev)
 {
 	int i;
 	struct fsl_qdma_queue *status;
@@ -1283,7 +1283,6 @@ static int fsl_qdma_remove(struct platform_device *pdev)
 		dma_free_coherent(&pdev->dev, sizeof(struct fsl_qdma_format) *
 				status->n_cq, status->cq, status->bus_addr);
 	}
-	return 0;
 }
 
 static const struct of_device_id fsl_qdma_dt_ids[] = {
@@ -1298,7 +1297,7 @@ static struct platform_driver fsl_qdma_driver = {
 		.of_match_table = fsl_qdma_dt_ids,
 	},
 	.probe          = fsl_qdma_probe,
-	.remove		= fsl_qdma_remove,
+	.remove_new	= fsl_qdma_remove,
 };
 
 module_platform_driver(fsl_qdma_driver);