baytrail: Battery cutoff return codes were backwards

cutoff() returns 0 on success, not non-zero.

BUG=chrome-os-partner:25646
BRANCH=rambi
TEST=ectool batterycutoff succeeds

Change-Id: Icca0c53aba82381b73dd679de5df3a97153d0662
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/185737
Reviewed-by: Benson Leung <bleung@chromium.org>
Reviewed-by: Dave Parker <dparker@chromium.org>
2 files changed