Revert "msm: qpnp-power-on: Add finer control of PMIC power off type"

This reverts commit 03cb8f96e42023cb6b16b2a0f824b16c07786591.
The idea is nice, but it needs matching firmware.

Change-Id: I8590145b17cb6a4406c057a24296fe0ce6f7ce0e