regulator: cpr4-mmss: Add mmss CPR platform specific driver for msmfalcon

The MMSS CPR in msmfalcon requires a slightly different configuration
than the existing cpr3 based MMSS CPR instances. Create a new platform
specific mmss cpr file for capturing the falcon specific configuration.

CRs-Fixed: 1068294
Change-Id: I779074d0aba35827e1a8264385149967cb9973f3
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>