hdctools: add skate servo configs

BUG=chrome-os-partner:26526
TEST=manually run these:
sudo emerge hdctools
sudo servod --board=skate

Signed-off-by: Katie Roberts-Hoffman <katierh@chromium.org>
Change-Id: I93b086aa3b693c9a07d24984da217dd78db3f362
Reviewed-on: https://chromium-review.googlesource.com/188925
Reviewed-by: Yusuf Mohsinally <mohsinally@chromium.org>
3 files changed