For oak, set a different list of task (no als, no accel) for compiling
revision 4 or less. Fix GPIO include issue.
BUG=chrome-os-partner:59423,chrome-os-partner:59084
TEST=compile for oak with board 4 and 5, tested on Reef.
BRANCH=kevin,reef
Change-Id: I09051a69cbad6d477a7b3bf9907f4c5c144b5136
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/424220
Reviewed-by: Randall Spangler <rspangler@chromium.org>