Even though these 2.4. interfaces are already gone in Dave Jones' cpufreq
bitkeeper tree, here's a patch which properly announces it in
Documentation/feature-removal-schedule.txt:

Add meaningful content concerning the removal of deprecated interfaces to
the cpufreq core.
Signed-off-by: Dominik Brodowski <linux@brodo.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>