ARM: dts: msm: Add ADC channel nodes for kona

Add VADC and ADC_TM peripheral channels to read ADC channels
such as VPH_PWR and board level system thermistors connected
to AMUX inputs on PM8150B, PM8150 and PM8150L.

Change-Id: I19d575b9ad05c1c8bcafe4a8ebb2b02ac90f2d4a
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>