defconfig: msm: Enable DDR bus scaling cooling device driver for mdm9607

Enable DDR cooling device driver for mdm9607. It places DDR
frequency restriction during high temperature condition.

Change-Id: I661d2818378ab3611eec834bcb2f1b7b671e99a9
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>