regulator: cpr3-regulator: add support for CPRh aging adjustment

Add support to perform a CPR aging measurement and subsequent
target quotient and open-loop voltage adjustments for CPRh
controllers at registration time.

Change-Id: I3a48a912fb9dea37a6197c1a13c2b41454d2dcff
CRs-Fixed: 1048890
Signed-off-by: David Collins <collinsd@codeaurora.org>