p9_tor: Fix the Instance ring tor offset in TOR layout
p9_tor: Fix the Instance ring tor offset in TOR layout

MikeO:
- Updated the fix in anticipation of 31524+31551 merge conflicts
  and changed variable name accordingly from ringTorofset to
  acc_offset.
- Also updated the corresponding CME and SGPE functions.

Change-Id: I8c9f3bc3ff07a9283771d7ea71ce30156b914acb
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/33662
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Tested-by: PPE CI <dc75934ba5befb9221434e67a247b93aec46b36b@us.ibm.com>
Tested-by: Hostboot CI <52521565bd8ea18a2b112942dce4f4220a97c2c8@us.ibm.com>
Reviewed-by: Martin Gloff <df0a4963746ae04ab678d064fccc7ee68adfd751@us.ibm.com>
Reviewed-by: Richard J. Knight <94c04f3910596886be97211d492ad29f0ba29cd5@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <ab93eca12e43608f33daa16a67357cd7b7e867ab@us.ibm.com>

open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot,open-power/hostboot