glados: Add PD device

Add the PD device to glados so it can be queried.

BUG=chrome-os-partner:42561
BRANCH=none
TEST=mosys pd info

Change-Id: I16590c25ccec9ae69f0495dccdc046784643c978
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/286874
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
3 files changed