power: qpnp-fg: Support configuring battery soc via charge_full property

Add support for POWER_SUPPLY_PROP_CHARGE_FULL property in fuel gauge
so that the charger can implement the workaround to prevent the
internal representation of battery soc from reaching 100% so that the
pulse is not prevented.

CRs-Fixed: 745467
Change-Id: If0fc441bec4876e099b5e5ce56cdd722d92b3466
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>