This patch adds i2c suite to run_ects.py. It also adds checks for
return values from i2c_read and i2c_write functions.
BUG=chromium:653183
BRANCH=none
TEST=Run run_ects.py and verify all test pass.
Change-Id: Ie3d6e1e6f131235e2b28f39e1546c9cb4c3b92f6
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/547024
Reviewed-by: Randall Spangler <rspangler@chromium.org>