ARM: dts: msm: Add Vph monitoring BCL configuration for APQ8084

Add the Vph battery voltage monitoring configurations for
low and high voltage thresholds and Vph ADC channel number.

CRs-Fixed: 629894
Change-Id: I836b9ba2783695237dc4d83d1dd6cb8170f01a3c
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>