mmc: sdio: Tidy error path in mmc_attach_sdio()

The error path deletes the device by calling mmc_sdio_remove() which must
be called without the host claimed. Simplify the error path so it does just
that and add a comment about why we don't disable runtime PM.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/core/sdio.c

@@ -1159,14 +1159,13 @@ int mmc_attach_sdio(struct mmc_host *host)
 	return 0;
 
 
-remove_added:
-	/* Remove without lock if the device has been added. */
-	mmc_sdio_remove(host);
-	mmc_claim_host(host);
 remove:
-	/* And with lock if it hasn't been added. */
 	mmc_release_host(host);
-	if (host->card)
+remove_added:
+	/*
+	 * The devices are being deleted so it is not necessary to disable
+	 * runtime PM.
+	 */
 	mmc_sdio_remove(host);
 	mmc_claim_host(host);
 err: