thermal: cpu_cooling: Aggregate cooling device vote for all related CPUs

There can be multiple cpu cooling devices among same related CPUs
and these cpu cooling devices can place different request at same
time. In such cases, it needs to check and aggregate request for
all cooling devices of related CPUs of that cpu freq policy.

Add support to aggregate cpu cooling vote for all related CPUs cooling
devices in cpu frequency callback.

Change-Id: I0a7a7be98458ac7a3902f2be4d98b025128c4c8a
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>