S5P: mmc: Resolved interrupt error during mmc_init

Blocksize was hardcoded to 512 bytes. But the blocksize varies
depeding on various mmc subsystem commands (between 8 and 512).
This hardcoding was resulting in interrupt error during data
transfer.

It is now calculated based upon the request sent by mmc subsystem.

Signed-off-by: Chander Kashyap <chander.kashyap@linaro.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

drivers/mmc/s5p_mmc.c

@@ -51,7 +51,7 @@ static void mmc_prepare_data(struct mmc_host *host, struct mmc_data *data)
 	writeb(ctrl, &host->reg->hostctl);
 
 	/* We do not handle DMA boundaries, so set it to max (512 KiB) */
-	writew((7 << 12) | (512 << 0), &host->reg->blksize);
+	writew((7 << 12) | (data->blocksize & 0xFFF), &host->reg->blksize);
 	writew(data->blocks, &host->reg->blkcnt);
 }