coral: initial coral servo overlay

This patch initiates servo overlay for coral
which copies from the reef one.

BUG=b:63763498
TEST=run 'cros_workon --host start hdctools &&
sudo emerge hdctools && sudo servod --board=coral'

Change-Id: If763a5579dfca3661e0c781af3995c21e2bbe25b
Signed-off-by: Harry Pan <harry.pan@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/538377
Reviewed-by: YH Lin <yueherngl@chromium.org>
Reviewed-by: Paris Yeh <pyeh@chromium.org>
1 file changed