mosys: Enable sysfs_lowest_smbus_test.

BUG=chromium:910641
TEST=sudo FEATURES='test' emerge mosys

Change-Id: Ie7179513000c7fd8ae0a30fc750d8caa8e1db73b
Reviewed-on: https://chromium-review.googlesource.com/1473472
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Andrew Lamb <andrewlamb@chromium.org>
Reviewed-by: Gregory Meinke <gmeinke@chromium.org>
16 files changed