mmc: use the generic error number

Use the generic error number instead of specific error number.
If use the generic error number, it can debug more easier.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>
diff --git a/drivers/mmc/mxcmmc.c b/drivers/mmc/mxcmmc.c
index 561b204..8038f90 100644
--- a/drivers/mmc/mxcmmc.c
+++ b/drivers/mmc/mxcmmc.c
@@ -211,11 +211,11 @@
 		} else if (stat & STATUS_CRC_WRITE_ERR) {
 			u32 err_code = (stat >> 9) & 0x3;
 			if (err_code == 2) /* No CRC response */
-				data_error = TIMEOUT;
+				data_error = -ETIMEDOUT;
 			else
 				data_error = -EILSEQ;
 		} else if (stat & STATUS_TIME_OUT_READ) {
-			data_error = TIMEOUT;
+			data_error = -ETIMEDOUT;
 		} else {
 			data_error = -EIO;
 		}
@@ -238,7 +238,7 @@
 
 	if (stat & STATUS_TIME_OUT_RESP) {
 		printf("CMD TIMEOUT\n");
-		return TIMEOUT;
+		return -ETIMEDOUT;
 	} else if (stat & STATUS_RESP_CRC_ERR && cmd->resp_type & MMC_RSP_CRC) {
 		printf("cmd crc error\n");
 		return -EILSEQ;