msm: camera: Add new bw voting logic for cpas and its clients

Adding new logic for bandwidth voting in client drivers by
classifying and comparing bw vote updates. Also, adding logic
to update bw vote and camnoc axi clock frequency as per camnoc
hw block by representing bus paths inside camnoc hw as tree
graph in DT. Overall voting includes traversing through the
tree and calculating consolidated votes to finally determine
appropriate camnoc axi clock frequency and mnoc bw vote.

Change-Id: Iea07973ca6d38cce4190d601eca7909e601b6924
Signed-off-by: Mukund Madhusudan Atre <matre@codeaurora.org>