power_supply: Add BATT_FULL and RECHARGE_SOC properties

Add the below power supply properties to be used by Qgauge.

POWER_SUPPLY_PROP_BATT_FULL_CURRENT - To report the current
at which battery reports 100% SOC.
POWER_SUPPLY_PROP_RECHARGE_SOC - To report the SOC at which
the battery restarts charging.

Change-Id: Iacb28b04b34ca603651a0437ee7e97abfd638b21
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>