ARM: dts: qcom: Add thermal_zone support for mdm9607

Add mdm9607-thermal.dtsi in repository that includes
thermal_zone support for mdm9607.Also include this
file in mdm9607.dtsi.

Add thermal_zone sysfs entries with respect to
five sensor locations: nav, wddac, modem-dsp, ipss
and cpuss respectively.

Change-Id: Iea0243ae3a6a8685331b44a3ebd492fa61217cac
Signed-off-by: Sagar Chormale <schormal@codeaurora.org>
Signed-off-by: Sivasri Kumar Vanka <sivasri@codeaurora.org>