ARM: dts: msm: Add msm-thermal mitigation devices for APQ8084

Add kernel msm-thermal mitigation device for APQ8084 SoC.
This enables the Kernel Thermal Monitor(KTM) during boot-up,
which provides basic thermal mitigation. The KTM is enabled
till the userspace thermal mitigation takes over.

Change-Id: I728b9e1882d82befdad3bb5b1f41e4f411bbb33e
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>