Add kernel Hibernation code for porter board.

Add kernel Hibernation code for porter board.

This patch set is a support to Hibernation for a porter board.
I've commit with Hibernation Off patch, because it depends strongly on user land.
If you can use Hibernation, Please add local.conf agl-porter-hibernate.
OVERRIDES .= ":agl-porter-hibernate"
DISTRO_FEATURES_append = " agl-porter-hibernate"

Change-Id: Ic64c9494a4bbd2518ef1aa334325b96eb7a9479e
Signed-off-by: Yuichi Kusakabe <yuichi.kusakabe@jp.fujitsu.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/9451
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>