regulator: cprh-kbss-regulator: add support for SDM845 CPR controllers

SDM845 chips contain two CPRh controllers.  The first of these
controllers contains two CPR threads which correspond to the
power CPU cluster and the L3 cache.  The second controller
contains a single CPR thread which corresponds to the performance
CPU cluster.

The CPRh controllers found on SDM845 have hardware version 4.5.
This hardware version utilizes a new register map in order to
handle multiple CPR threads.

Update the cprh-kbss-regulator and cpr3-regulator drivers in
order to support SDM845 CPRh controllers and CPRh controller
version 4.5.

Change-Id: I94b0d5ee0eaf548d3d1a94c7ae181169d28c0e31
Signed-off-by: David Collins <collinsd@codeaurora.org>