ARM: dts: msm: Enable DDR cooling device driver for mdm9607

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

Add thermal zone trip to enable DDR cooling device mitigation.

Change-Id: I55db6866f8471db82c58929a602aee838e6efec4
Signed-off-by: Manaf Meethalavalappu Pallikunhi <manafm@codeaurora.org>