ARM: dts: msm: Add VADC and ADC_TM channels for plutonium

Add VADC reference channels and ADC TM channels to
support reading thermistors like case_therm, ambient
therm and pa_therm's. This includes the DCIN and USBIN
for the mini VADC.

Change-Id: I27eab6e90a36de9df7be22dd6cae8dbe9163f45f
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>