PM: Customization of CME and SGPE rings in HOMER.

  - Extracts rings from hardware image and VPD and stashes in to
    a temp buffer using HWP p9_xip_customize. Subsequently, using
    TOR API creates a fresh and leaner layout of scan rings in
    HOMER.

  - Implements a debug infrastructure to verify the scan ring layout
    in HOMER.

  - Implemented scan ring overrides for core common and cache common
    rings.

  - Introduces size check for various sections of HOMER.

Change-Id: I66f2c17926821a73bf69738e2f3b68498ac90290
Original-Change-Id: I8d7785f632823c31077bd4f320c453129be4ef0c
RTC:157954
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/27697
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Michael S. Floyd <mfloyd@us.ibm.com>
Dev-Ready: Michael S. Floyd <mfloyd@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/36654
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Tested-by: Daniel M. Crowell <dcrowell@us.ibm.com>