ARM: dts: msm: Fix Qgauge and PON DT configuration for PMI632

Remove the VBAT based thresholds for QG, they default to the
values from the driver. Update the interrupt type confguration
to reflect the requirement.

Update the PON s3-src configuration to KPDPWR as PMI632 does
not support any other configuration.

Change-Id: I5e2ea806e77465b504f5481509cd4c3dc33760e7
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>