Merge changes...

Merge changes I02e7c78e,I68e8bb72,Id3e36c1a,I240bfdbd,Ifa8efe1e,Ie846350e,Ic1ae741c,Ia640164e,I1015b800,Ide05f7da,Ib22e03ce,I333c97c0,Ia47d1c4e,Id8d84d61 into msm-3.4

* changes:
  power: pm8921-bms: use shutdown soc if it is within limits
  power: pm8921-bms: dont adjust at high battery capacity
  power: pm8921-bms: iterate rbatt algorithm
  power: pm8921-bms: use background work to calculate soc
  power: pm8921-bms: adjust rbatt and ocv both for shutdown soc
  power: pm8921-charger: increase hearbeat if battery is low
  power: pm8921-bms: increase soc slowly while charging
  power: pm8921-bms: remove Dynamic Unusable Charge algorithm
  power: pm8921-bms: use shutdown_soc to force power on soc
  power: pm8921-bms: use direct charger api instead of power supply api
  power: pm8921-bms: periodic hkadc calibration
  power: pm8xxx-ccadc: missing calibration at bootup
  power: pm8921-bms: fix rounding down state of charge
  power: pm8921-bms: remove reading rbatt from bms