ARM: dts: msm: add dynamic-power-coefficient property for Kona

The "dynamic-power-coefficient" in DT is used to build Energy Model
which in turn used by EAS to take placement decisions.

Change-Id: If22d0bcb053d7878c61ac2b7030de1161a289a09
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>