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/omap_hsmmc.c b/drivers/mmc/omap_hsmmc.c
index 0a1ee40..b326846 100644
--- a/drivers/mmc/omap_hsmmc.c
+++ b/drivers/mmc/omap_hsmmc.c
@@ -511,7 +511,7 @@
 	return 0;
 }
 
-static void omap_hsmmc_set_ios(struct mmc *mmc)
+static int omap_hsmmc_set_ios(struct mmc *mmc)
 {
 	struct hsmmc *mmc_base;
 	unsigned int dsor = 0;
@@ -559,10 +559,12 @@
 	while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
 		if (get_timer(0) - start > MAX_RETRY_MS) {
 			printf("%s: timedout waiting for ics!\n", __func__);
-			return;
+			return -ETIMEDOUT;
 		}
 	}
 	writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
+
+	return 0;
 }
 
 #ifdef OMAP_HSMMC_USE_GPIO