sched: EAS: colocate related threads

Add colocation awareness to energy aware task placement and
load balancer. For related threads, select the CPU in the
preferred cluster if the task can fit there. Otherwise break
the colocation and select the cluster on which the task can fit.

Change-Id: Iff53251f4a353090341210ae5834e92fc5b43613
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>