power: qpnp-linear-charger: Add BMS controlled charging

Allow the BMS to control the charging by writing the STATUS
property of battery power-supply.

To enable this feature, following DT param needs to be defined:
- qcom,bms-controlled-charging: This enables BMS to control the
recharge.

Change-Id: I84471d083c2d101066c483e9a01376f5d2c992a5
Signed-off-by: Jie Cheng <rockiec@codeaurora.org>