Skylake boards: Enabling HWP

This patch provides config options to enable/disable Intel SST.

BUG=chrome-os-partner:47517
BRANCH=None
TEST=Booted kunimitsu/lars, verified HWP driver load successfully.

CQ-DEPEND=CL:313107

Change-Id: I328b074b4f56ebe3caa8952ce3df7f834c1cf40f
Signed-off-by: Robbie Zhang <robbie.zhang@intel.com>
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/326650
Tested-by: Wenkai Du <wenkai.du@intel.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
4 files changed