mmc: rtsx_pci: Use devm_mmc_alloc_host() helper

Use new function devm_mmc_alloc_host() to simplify the code.

Reviewed-by: Huacai Chen <[e-mail]>
Signed-off-by: Binbin Zhou <[e-mail]>
Link: https://lore.kernel.org/r/f1[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/rtsx_pci_sdmmc.c

···
 
 	dev_dbg(&(pdev->dev), ": Realtek PCI-E SDMMC controller found\n");
 
-	mmc = mmc_alloc_host(sizeof(*host), &pdev->dev);
+	mmc = devm_mmc_alloc_host(&pdev->dev, sizeof(*host));
 	if (!mmc)
 		return -ENOMEM;
 
···
 	if (ret) {
 		pm_runtime_dont_use_autosuspend(&pdev->dev);
 		pm_runtime_disable(&pdev->dev);
-		mmc_free_host(mmc);
 		return ret;
 	}
 
···
 
 	pm_runtime_dont_use_autosuspend(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-
-	mmc_free_host(mmc);
 
 	dev_dbg(&(pdev->dev),
 		": Realtek PCI-E SDMMC controller has been removed\n");