defconfig: msm8937/msm8940: Enable core control

core control enables you to save power by controlling how many
cores are being used depending on the load in the system.

Change-Id: Ic7b2bbf54716de47184a65fd001f0aa325a32af7
Signed-off-by: Olav Haugan <ohaugan@codeaurora.org>
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>