mmc: host: phytium-mci-plat: Convert to platform remove callback retu…

…rning void

0edb555: platform: Make platform_driver::remove() return void
cause build error, so convert .remove from int to void

Log:
drivers/mmc/host/phytium-mci-plat.c:181:19: error: initialization of ‘void (*)(struct platform_device *)’ from incompatible pointer type ‘int (*)(struct platform_device *)’ [-Werror=incompatible-pointer-types]
  181 |         .remove = phytium_mci_remove,
      |                   ^~~~~~~~~~~~~~~~~~
drivers/mmc/host/phytium-mci-plat.c:181:19: note: (near initialization for ‘phytium_mci_driver.<anonymous>.remove’)

drivers/mmc/host/phytium-mci-plat.c

@@ -127,22 +127,22 @@ static int phytium_mci_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int phytium_mci_remove(struct platform_device *pdev)
+static void phytium_mci_remove(struct platform_device *pdev)
 {
 	struct mmc_host *mmc;
 	struct phytium_mci_host *host;
 
 	mmc = platform_get_drvdata(pdev);
 	if (!mmc) {
 		dev_info(&pdev->dev, "%s %d: mmc is null.\n", __func__, __LINE__);
-		return -1;
+		return;
 	}
 	host = mmc_priv(mmc);
 	if (!host) {
 		dev_info(&pdev->dev, "%s %d: host is null.\n", __func__, __LINE__);
 		mmc_remove_host(mmc);
 		mmc_free_host(mmc);
-		return -1;
+		return;
 	}
 	del_timer(&host->hotplug_timer);
 	mmc_remove_host(host->mmc);
@@ -155,7 +155,6 @@ static int phytium_mci_remove(struct platform_device *pdev)
 	phytium_mci_deinit_hw(host);
 	mmc_free_host(mmc);
 	platform_set_drvdata(pdev, NULL);
-	return 0;
 }
 
 static const struct of_device_id phytium_mci_of_ids[] = {