servod: Implement servo v4 post init servo micro init method.

BUG=chromium:599538
TEST=locally on servo host that servo micro got properly initialized
with servo v4.

Change-Id: Icbbb51b9b7f70e4a97d763db063b070991ce8d9b
Reviewed-on: https://chromium-review.googlesource.com/362615
Commit-Ready: Kevin Cheng <kevcheng@chromium.org>
Tested-by: Kevin Cheng <kevcheng@chromium.org>
Reviewed-by: Simran Basi <sbasi@chromium.org>
Reviewed-by: Todd Broch <tbroch@chromium.org>
1 file changed