power_supply: add POWER_SUPPLY_PROP_(BATFET_MODE/MIN_CIL) properties

Add power_supply properties to expose parallel charger configuration.
POWER_SUPPLY_PROP_BATFET_MODE property exposes BATFET configuration
of parallel charger and POWER_SUPPLY_PROP_MIN_ICL property exposes
minimum ICL configuration required by parallel charger.

Change-Id: I477789b4ea9dd56ac34606b00566f46aa6f84aa5
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>