ARM: dts: msm: add some zones and regulator cooling device for spyro

all lowf thermal zone hasn't been build successfully because of
the deleted property of cx_cdev.so add low_limits governor
for some zones to cooling better when track low temp.
and add pm660 cx regulator to cooling device.

Change-Id: I402c0ce1bb70baf28c7883f30326381701eeacc1
Signed-off-by: Jing Xue <jingxue@codeaurora.org>