CHROMIUM: config: disable CONFIG_MMC_SDHCI_S3C config

CHROMIUM: config: disable CONFIG_MMC_SDHCI_S3C config

We dont use SDHCI-S3C controller on snow, lets disable this driver.

BUG=none
TEST=build ok booted on snow from SD card, did chromeos-install
     and then booted from eMMC. Connected WIFI and able to browse.
     run ./chromeos/script/kernelconfig oldconfig to normalize config.

Change-Id: Ide0eba1cdb41bed58ec4e14d6ff6bc83b5f78a4a
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/33397
Reviewed-by: Doug Anderson <dianders@chromium.org>