mmc: au1xmmc: Use devm_mmc_alloc_host() helper

Use new function devm_mmc_alloc_host() to simplify the code.

Cc: Manuel Lauss <[e-mail]>
Reviewed-by: Huacai Chen <[e-mail]>
Signed-off-by: Binbin Zhou <[e-mail]>
Link: https://lore.kernel.org/r/7d[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/au1xmmc.c

···
 	struct resource *r;
 	int ret, iflag;
 
-	mmc = mmc_alloc_host(sizeof(struct au1xmmc_host), &pdev->dev);
+	mmc = devm_mmc_alloc_host(&pdev->dev, sizeof(*host));
 	if (!mmc) {
 		dev_err(&pdev->dev, "no memory for mmc_host\n");
-		ret = -ENOMEM;
-		goto out0;
+		return -ENOMEM;
 	}
 
 	host = mmc_priv(mmc);
···
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!r) {
 		dev_err(&pdev->dev, "no mmio defined\n");
-		goto out1;
+		return ret;
 	}
 
 	host->ioarea = request_mem_region(r->start, resource_size(r),
 					   pdev->name);
 	if (!host->ioarea) {
 		dev_err(&pdev->dev, "mmio already in use\n");
-		goto out1;
+		return ret;
 	}
 
 	host->iobase = ioremap(r->start, 0x3c);
···
 out2:
 	release_resource(host->ioarea);
 	kfree(host->ioarea);
-out1:
-	mmc_free_host(mmc);
-out0:
 	return ret;
 }
 
···
 		iounmap((void *)host->iobase);
 		release_resource(host->ioarea);
 		kfree(host->ioarea);
-
-		mmc_free_host(host->mmc);
 	}
 }