mmc: sdhci-omap: 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 (mostly) ignored
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.

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20230727070051.17778-31-frank.li@vivo.comSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-omap.c

@@ -1393,7 +1393,7 @@ static int sdhci_omap_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int sdhci_omap_remove(struct platform_device *pdev)
+static void sdhci_omap_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct sdhci_host *host = platform_get_drvdata(pdev);
@@ -1407,8 +1407,6 @@ static int sdhci_omap_remove(struct platform_device *pdev)
 	/* Ensure device gets disabled despite userspace sysfs config */
 	pm_runtime_force_suspend(dev);
 	sdhci_pltfm_free(pdev);
-
-	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -1477,7 +1475,7 @@ static const struct dev_pm_ops sdhci_omap_dev_pm_ops = {
 
 static struct platform_driver sdhci_omap_driver = {
 	.probe = sdhci_omap_probe,
-	.remove = sdhci_omap_remove,
+	.remove_new = sdhci_omap_remove,
 	.driver = {
 		   .name = "sdhci-omap",
 		   .probe_type = PROBE_PREFER_ASYNCHRONOUS,