kernel: modify mtd related patches for 3.14

The change is the same as ("kernel/generic: modify mtd related
patches"). Since these files are under files directory, not a files
directory of specific kernel version, better to also change them. So
it will avoid adding files to future specific files directory
(e.g. files-3.14) for this mtd related change.

Signed-off-by: Zhao, Gang <gamerh2o@gmail.com>

SVN-Revision: 40732