cpufreq: Re-arrange declarations in cpufreq.h

They are pretty much mixed up.  Although generic headers are present,
definitions/declarations are present outside of them too ...

This patch just moves stuff up and down to make it look better and
consistent.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Git-commit: 74aca95da74836a6807118f6590d8df8232c74a9
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Junjie Wu <junjiew@codeaurora.org>