ARM: dts: msm: Add thermal sensor information for msm8994

Add sensor information devicetree for msm8994. This
will have all necessary information about thermal
sensors on a target such as its type, name, alias
and scalling factor.

Change-Id: I0400aad732cfe853847087458a4677345bdc4021
Signed-off-by: Shiju Mathew <shijum@codeaurora.org>