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/bfin_sdh.c b/drivers/mmc/bfin_sdh.c
index 9bdfbbc..0e493da 100644
--- a/drivers/mmc/bfin_sdh.c
+++ b/drivers/mmc/bfin_sdh.c
@@ -109,9 +109,9 @@
 	}
 
 	if (status & CMD_TIME_OUT)
-		ret = TIMEOUT;
+		ret = -ETIMEDOUT;
 	else if (status & CMD_CRC_FAIL && flags & MMC_RSP_CRC)
-		ret = COMM_ERR;
+		ret = -ECOMM;
 	else
 		ret = 0;
 
@@ -136,7 +136,7 @@
 
 	/* Don't support write yet. */
 	if (data->flags & MMC_DATA_WRITE)
-		return UNUSABLE_ERR;
+		return -EOPNOTSUPP;
 #ifndef RSI_BLKSZ
 	data_ctl |= ((ffs(data->blocksize) - 1) << 4);
 #else
@@ -194,10 +194,10 @@
 
 		if (status & DAT_TIME_OUT) {
 			bfin_write_SDH_STATUS_CLR(DAT_TIMEOUT_STAT);
-			ret |= TIMEOUT;
+			ret = -ETIMEDOUT;
 		} else if (status & (DAT_CRC_FAIL | RX_OVERRUN)) {
 			bfin_write_SDH_STATUS_CLR(DAT_CRC_FAIL_STAT | RX_OVERRUN_STAT);
-			ret |= COMM_ERR;
+			ret = -ECOMM;
 		} else
 			bfin_write_SDH_STATUS_CLR(DAT_BLK_END_STAT | DAT_END_STAT);