ARM: dts: msm: configure Charger WD bark timer for SM8150 platforms

Currently the charger bark watchdog timer is configured to 64 s by
default. Change it to 16 s so that the SW step charging algorithm
can evaluate the charging conditions quickly.

CRs-Fixed: 2306080
Change-Id: Ibefd8a274aac24bf89f1704d872ee624b9af3150
Signed-off-by: Harry Yang <harryy@codeaurora.org>