portage-stable: Upgrade sys-power/powertop from 2.0 to 2.2

This updates powertop from 2.0 to 2.2, using the ebuild from upstream
Portage.

Building within ChromiumOS required only two changes to the upstream
ebuild: dropping EABI from 5 to 4 (no EABI 5 features used), and
unmasking the ebuild for amd64, x86, and arm.

BUG=None
TEST=Built and booted ChromiumOS, and ran powertop manually

Change-Id: Ib4ca1475da553b9d2bd2493a9945670d0decffc4
Reviewed-on: https://gerrit.chromium.org/gerrit/44898
Tested-by: Josh Triplett <josh@joshtriplett.org>
Commit-Queue: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
8 files changed