Add rambi power measurements ADCs.

These are sense resistors wired over to servo V1 local ADCs on 1v5.

BUG=chrome-os-partner:23725
TEST=manual, measure power ... readings make sense

Change-Id: Ica12e149f7d1db95723f60a84bd4d633669f598d
Reviewed-on: https://chromium-review.googlesource.com/183524
Tested-by: Todd Broch <tbroch@chromium.org>
Reviewed-by: Derek Basehore <dbasehore@chromium.org>
Commit-Queue: Todd Broch <tbroch@chromium.org>
2 files changed