DRIVERS: DW_MMC: Correct the fifo_size

fifoth register does not have the fifo_size. For emmc to work,
fifo_size should be set 0x80.

Signed-off-by: Inderpal Singh <inderpal.singh@linaro.org>
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 4070d4e..2fc5e90 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -331,7 +331,7 @@
 	dwmci_writel(host, DWMCI_IDINTEN, 0);
 	dwmci_writel(host, DWMCI_BMOD, 1);
 
-	fifo_size = dwmci_readl(host, DWMCI_FIFOTH);
+	fifo_size = 0x80;
 	if (host->fifoth_val)
 		fifoth_val = host->fifoth_val;
 	else