ISL9237 and ISL9238 are almost identical, with few register changes,
let's make the driver generic, to support both chargers.
BRANCH=none
BUG=chrome-os-partner:61166
TEST=make buildall -j
Change-Id: I029894dd62ab7e45897d877289707ee8c1ff1d09
Reviewed-on: https://chromium-review.googlesource.com/422197
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>