power: smb135x-charger: Disable TEMP MONITOR in parallel charger mode

The parallel SMB135x charger configuration may share battery thermistor
with PMIC and hence the default configuration has TEMP MONITOR enabled.
As the battery-temperature based parallel charger control is managed in SW,
disable the hardware TEMP MONITOR configuration on SMB135x.

CRs-Fixed: 1058586
Change-Id: Ic09ff82ddf9efbb9f1766c8bba1a5b50adafb157
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>