baytrail: add punit access functions

Like the bunit and dunit, add the punit accessor functions.

BUG=chrome-os-partner:23085
BRANCH=None
TEST=Built.

Change-Id: Ifd7184dfca8c0491c107bc1c562ea1ded444e372
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/171931
2 files changed