qpnp-fg-gen3: add support to configure and handle delta battery temperature

Battery temperature delta configuration can be used to know the
battery temperature change. There is an interrupt associated
with this configuration which can be used to update the battery
health of the device.

Change-Id: Ic55b9bb34ac9912f88dab6a11ec365814b525ca2
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>