mmc: cavium: Use devm_mmc_alloc_host() helper

Use new function devm_mmc_alloc_host() to simplify the code.

Cc: Robert Richter <[e-mail]>
Reviewed-by: Huacai Chen <[e-mail]>
Signed-off-by: Binbin Zhou <[e-mail]>
Link: https://lore.kernel.org/r/9a[e-mail]
Signed-off-by: Ulf Hansson <[e-mail]>

drivers/mmc/host/cavium.c

···
 	struct mmc_host *mmc;
 	int ret, id;
 
-	mmc = mmc_alloc_host(sizeof(struct cvm_mmc_slot), dev);
+	mmc = devm_mmc_alloc_host(dev, sizeof(*slot));
 	if (!mmc)
 		return -ENOMEM;
 
···
 
 	ret = cvm_mmc_of_parse(dev, slot);
 	if (ret < 0)
-		goto error;
+		return ret;
 	id = ret;
 
 	/* Set up host parameters */
···
 	if (ret) {
 		dev_err(dev, "mmc_add_host() returned %d\n", ret);
 		slot->host->slot[id] = NULL;
-		goto error;
 	}
-	return 0;
-
-error:
-	mmc_free_host(slot->mmc);
 	return ret;
 }
 
···
 {
 	mmc_remove_host(slot->mmc);
 	slot->host->slot[slot->bus_id] = NULL;
-	mmc_free_host(slot->mmc);
 	return 0;
 }