UCM config: Add UCM config for Strago

Handle initialization and headset plugging for Braswell reference platforms.

BUG=chrome-os-partner:36319
TEST=`emerge-strago adhd` and verify ucm files are installed to
/build/strago/usr/share/alsa/ucm

Originally-from: Fang, Yang A <yang.a.fang@intel.com>
Signed-off-by: Kevin Strasser <kevin.strasser@intel.com>

Change-Id: I87d70ff18659ec24ca0de25f473c6c7ae9d8760f
Reviewed-on: https://chromium-review.googlesource.com/245930
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Tested-by: Kevin Strasser <kevin.strasser@intel.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
4 files changed