spring: Account for voltage divider on VAC/VACS

We now have a 3/5 voltage divider on VAC/VACS, so we should report
    VAC = VACS * 5 / 3
instead of current
    VAC = VACS
This is just a cosmetic fix so as to make it less confusing.

BUG=chrome-os-partner:23899
TEST=Build spring
BRANCH=spring

Change-Id: I86a170468556f73c8cc6d8b636390e9bd220a847
Signed-off-by: Vic (Chun-Ju) Yang <victoryang@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/177715
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
2 files changed