power: Support non-INT power signal pins

Optionally do polling for power signal pins
which are not set as INT pins.

BUG=b:64528567
BRANCH=none
TEST=boot scarlet rev1 with a non-INT power signal pin

Change-Id: I327753fcc0f1c6482c5f5eb3df28f67181b4eb62
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/611649
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
1 file changed