mmc: core: disable software CRCs

Change-Id: I2cb653ea1da422faad58c8fa7c76509215681a49
Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>
fs: disable fsync

Change-Id: I9951e9d4b4b940d4b194c591c74c24d91a895cb4
Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>