With cmwq, there's no reason for cpufreq drivers to use separate
workqueues.  Remove the dedicated workqueues from cpufreq_conservative
and cpufreq_ondemand and use system_wq instead.  The work items are
already sync canceled on stop, so it's already guaranteed that no work
is running on module exit.
Signed-off-by: NTejun Heo <tj@kernel.org>
Acked-by: NDave Jones <davej@redhat.com>
Cc: cpufreq@vger.kernel.org