Update processor MRW processing to use socket position
Update processor MRW processing to use socket position

Change-Id: I02e2856329ff309d6f90f3f70ae0029ebf5b8d4f
Forwardport: yes
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/23920
Tested-by: Jenkins Server
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>

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