regulator: kryo-regulator: support LDO/APM config values from Device Tree

The LDO and APM configuration register initialization values vary per
chip revision. Support parsing these from Device Tree in order to program
the correct values according to hardware guidelines. Also, specify the
current known values for both msm8996v2 and msm899v3.

Change-Id: I6cdcc961578c2ea760a9b04a0128da4ff262684c
Signed-off-by: Osvaldo Banuelos <osvaldob@codeaurora.org>