mmc: remove custom error codes

Convert the MMC layer to use standard error codes and not its own,
incompatible values.

Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index be730c0..d53e9a8 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -154,11 +154,11 @@
 	}
 	if (status & (MCI_DATACRCFAIL|MCI_DATATIMEOUT|MCI_TXUNDERRUN|MCI_RXOVERRUN)) {
 		if (status & MCI_DATACRCFAIL)
-			data->error = MMC_ERR_BADCRC;
+			data->error = -EILSEQ;
 		else if (status & MCI_DATATIMEOUT)
-			data->error = MMC_ERR_TIMEOUT;
+			data->error = -ETIMEDOUT;
 		else if (status & (MCI_TXUNDERRUN|MCI_RXOVERRUN))
-			data->error = MMC_ERR_FIFO;
+			data->error = -EIO;
 		status |= MCI_DATAEND;
 
 		/*
@@ -193,12 +193,12 @@
 	cmd->resp[3] = readl(base + MMCIRESPONSE3);
 
 	if (status & MCI_CMDTIMEOUT) {
-		cmd->error = MMC_ERR_TIMEOUT;
+		cmd->error = -ETIMEDOUT;
 	} else if (status & MCI_CMDCRCFAIL && cmd->flags & MMC_RSP_CRC) {
-		cmd->error = MMC_ERR_BADCRC;
+		cmd->error = -EILSEQ;
 	}
 
-	if (!cmd->data || cmd->error != MMC_ERR_NONE) {
+	if (!cmd->data || cmd->error) {
 		if (host->data)
 			mmci_stop_data(host);
 		mmci_request_end(host, cmd->mrq);