Scaling governor via sysctl?

["Todd A. Jacobs" <nospam@codegnome.org>]

I'd like to set my scaling governor in /etc/sysctl.conf, rather than by
echoing a value to:

    /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

However, I'm not finding a key for it via the sysctl utility. When I
run:

    sysctl -a | fgrep -i cpu

I get nothing. Why can I write to a value in sysfs that can't be
accessed with sysctl? And more importantly, how am I supposed to do this
at boot without sysctl.conf?

-- 
"Oh, look: rocks!"
	-- Doctor Who, "Destiny of the Daleks"