defconfig: msmcortex: enable QHMP scheduler

This config enables legacy HMP scheduler extensions like small task
classification for task packing, mostly_idle packing knobs and
energy-aware task placements and load balancing.

Change-Id: Ic3e128e845cb79fe461e29dd1900a1c35e885ffd
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>