Various changes to INT/NX/MMU initfiles

1. Added HW372116 fix to INT initfile
2. Changes to NX FIR actions, fix to disable abc checker
3. Added Issue 632 fix to MMU initfile

Change-Id: I4a886c5be7384ad374e884ffbe098727ffb7cc71
Original-Change-Id: I00a1b646738decefef9e540f655d5d9d0a825744
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/29768
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: Emmanuel Sacristan <esacris@us.ibm.com>
Reviewed-by: CHRISTOPHER D. HANUDEL <chanudel@us.ibm.com>
Dev-Ready: CHRISTOPHER D. HANUDEL <chanudel@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/36652
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Tested-by: Daniel M. Crowell <dcrowell@us.ibm.com>