Fix file permissions

Some source files in mosys were incorrectly added with 'execution'
permission and should be corrected as plain files.

BUG=None
TEST=None

Change-Id: Id2850dde4d589b9bcbff6f7b477c27c62017e326
Reviewed-on: https://chromium-review.googlesource.com/1697969
Tested-by: Hung-Te Lin <hungte@chromium.org>
Commit-Ready: Hung-Te Lin <hungte@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
5 files changed