Revert "mmc: core: disable sanitize operation."
This reverts commit 625cef6510b7c65fd043738fce577e017b415c0d.

Bug 1567183

Change-Id: I02f2b3cd20cc492737641632d9dace2a9702d2c8
Signed-off-by: Harry Hong <hhong@nvidia.com>
Reviewed-on: http://git-master/r/559682
mojo: Initial Board