These were silenced in:
commit d4342aff4c
Author: Andreas Sandberg <andreas.sandberg@arm.com>
Date: Mon Jun 6 17:16:43 2016 +0100
stats: Silence unused power stats
Change-Id: I273e8190b76335505bedfea88ef89abee1739b8a
Reviewed-on: https://gem5-review.googlesource.com/2643
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>