power: qpnp-smbcharger: only set CHARGE_DONE if terminated

The charger sets the POWER_SUPPLY_PROP_CHARGE_DONE on the bms power
supply during the chg_term interrupt handler function regardless of
whether charging actually terminated. In the cases of an instant
recharge trigger or manually calling the interrupt handler, the
CHARGE_DONE property will be falsely set.

Fix this by checking the real time status bit of the termination
interrupt before setting the charge_done property on the bms power
supply.

CRs-Fixed: 899712
Change-Id: I27e5969e462caba644e58095d6885e3b7e3c4523
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>