power: qg: Expose cc soc value through power supply property

Charge termination SW workaround requires the value of cc soc
for its execution. Add support to expose cc soc value through
POWER_SUPPLY_PROP_CC_SOC property.

Change-Id: I819037e8026a90ce974d95f24da2b138e154889a
Signed-off-by: Umang Agrawal <uagrawal@codeaurora.org>