Comment 4 for bug 1584124

Thanks Colin! So this confirms that we really should let the kernel be in "performance" during boot. But from https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1579278/comments/9 it actually sounds like we should leave it to "performance" all the time at least for processors which are ≤ 5 years old, as changing to "ondemand" is actually detrimental to power saving. So for those we don't need the init script at all, but if there's a simple way to tell apart these cases, then the init script could just not do anything on those newer processors, so that we can slowly phase this out.