Merge changes I2e8fcb4a,I0bbad22c,I22d2dbda,I3e5e92e3 into msm-3.4

* changes:
  power: pm8921-bms: use restart reason for usb detection
  mfd: pm8xxx: provide api to read restart reason
  power: pm8921-bms: report higher soc even when called within a second
  power: pm8921-bms: use consistent temperature units