power: qpnp-charger: Increase charge timeout values

* At 500mA it's quite likely the phone has not completely finished
  charging before charging is disabled.
* Increase the wall charger timeout to 12 hours, and the USB charger
  timeout to 16 hours.

Change-Id: Ibb605eeb5119c24109d91e2b5df596672c6ba7c2