sdio: change clock speed

Change clock speed to the highest supported by the card.
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>

drivers/mmc/core/sdio.c

@@ -293,6 +293,12 @@ int mmc_attach_sdio(struct mmc_host *host, u32 ocr)
 	if (err)
 		goto remove;
 
+	/*
+	 * No support for high-speed yet, so just set
+	 * the card's maximum speed.
+	 */
+	mmc_set_clock(host, card->cis.max_dtr);
+
 	/*
 	 * Initialize (but don't add) all present functions.
 	 */