sched/fair: Turn off FBT_STRICT_ORDER feature

Turning off FBT_STRICT_ORDER feature selects whichever of target CPU
or backup CPU that saves the most energy. The ftrace analysis
indicate that excessive packing can be avoided by placing the
task on backup CPU when it is idle.

Change-Id: I281c599f6236aa8c9b41c56509a533048a01da91
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>