mmc: sdhci-of-arasan: Obviously always return success in remove callback

sdhci_pltfm_unregister() returns 0 unconditionally and returning an
error in a platform remove callback isn't very sensible. (The only
effect of the latter is that the device core emits a generic warning and
then removes the device anyhow.)

So return 0 unconditionally to make it obvious there is no error
forwarded to the upper layers.

This is a preparation for making platform remove callbacks return void.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20220610211257.102071-4-u.kleine-koenig@pengutronix.deSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/sdhci-of-arasan.c

@@ -1733,7 +1733,6 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
 
 static int sdhci_arasan_remove(struct platform_device *pdev)
 {
-	int ret;
 	struct sdhci_host *host = platform_get_drvdata(pdev);
 	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
 	struct sdhci_arasan_data *sdhci_arasan = sdhci_pltfm_priv(pltfm_host);
@@ -1747,11 +1746,11 @@ static int sdhci_arasan_remove(struct platform_device *pdev)
 
 	sdhci_arasan_unregister_sdclk(&pdev->dev);
 
-	ret = sdhci_pltfm_unregister(pdev);
+	sdhci_pltfm_unregister(pdev);
 
 	clk_disable_unprepare(clk_ahb);
 
-	return ret;
+	return 0;
 }
 
 static struct platform_driver sdhci_arasan_driver = {