This allows us to repeatedly read the battery for testing.
BUG=chrome-os-partner:10888
TEST=manual:
build for all boards
boot on snow (cannot test i2c as it is
Change-Id: I0ed99d59355e1f228486070dcf37863563b16023
Reviewed-on: https://gerrit.chromium.org/gerrit/26290
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Commit-Ready: Simon Glass <sjg@chromium.org>