mmc: change the set_ios return type from void to int

To maintain consistency, set_ios type of legacy mmc_ops changed to int.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c
index e64ac3c..ddf8383 100644
--- a/drivers/mmc/arm_pl180_mmci.c
+++ b/drivers/mmc/arm_pl180_mmci.c
@@ -275,7 +275,7 @@
 	return 0;
 }
 
-static void host_set_ios(struct mmc *dev)
+static int  host_set_ios(struct mmc *dev)
 {
 	struct pl180_mmc_host *host = dev->priv;
 	u32 sdi_clkcr;
@@ -333,6 +333,8 @@
 
 	writel(sdi_clkcr, &host->base->clock);
 	udelay(CLK_CHANGE_DELAY);
+
+	return 0;
 }
 
 static const struct mmc_ops arm_pl180_mmci_ops = {