mmc: sdhci: use the generic error number

Use the generic error number instead of meaningless value.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mmc/kona_sdhci.c b/drivers/mmc/kona_sdhci.c
index c67a262..549f6bc 100644
--- a/drivers/mmc/kona_sdhci.c
+++ b/drivers/mmc/kona_sdhci.c
@@ -27,7 +27,7 @@
 
 	if (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & SDHCI_RESET_ALL) {
 		printf("%s: sd host controller reset error\n", __func__);
-		return 1;
+		return -EBUSY;
 	}
 
 	/* For kona a hardware reset before anything else. */
@@ -39,7 +39,7 @@
 	do {
 		if (timeout == 0) {
 			printf("%s: reset timeout error\n", __func__);
-			return 1;
+			return -ETIMEDOUT;
 		}
 		timeout--;
 		udelay(100);
@@ -67,7 +67,7 @@
 	while (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 		if (timeout == 0) {
 			printf("%s: CARD DETECT timeout error\n", __func__);
-			return 1;
+			return -ETIMEDOUT;
 		}
 		timeout--;
 		udelay(100);