Add si1141 to the list of motion sensors.
Setup IRQ line and other constants.
BRANCH=smaug
TEST=Check sensor is working
BUG=chrome-os-partner:32829
Change-Id: Ic05bc24164d067a1dee6a6241681420348d7a843
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/291336
Reviewed-by: Sheng-liang Song <ssl@chromium.org>