powerlog.py can access sweetberry and log power data.
Also included are marlin and kevin example board configs.
BUG=chromium:608039
TEST=log power data
BRANCH=None
Change-Id: I0f868d95d17d86522dca045a227a824563f93cd0
Signed-off-by: Nick Sanders <nsanders@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/413293
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
