Fix hb-Istep to work under simics
Fix hb-Istep to work under simics

Change-Id: I60dbd9940b2126969292519f8427efe31c90ad33
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/3185
Tested-by: Jenkins Server
Reviewed-by: Van H. Lee <4779028c32a38a4c4983eb75cd78dd3e7dcc26f0@us.ibm.com>
Reviewed-by: Daniel M. Crowell <912029ca9254ac7b5854e56910561d682e1fa2d0@us.ibm.com>
Reviewed-by: A. Patrick Williams III <c87e37b1a4035affd737b461af89fb722d635f4d@us.ibm.com>

alvintpwang/hostboot,Over-enthusiastic/hostboot,open-power/hostboot,open-power/hostboot,Over-enthusiastic/hostboot,csmart/hostboot,Over-enthusiastic/hostboot,alvintpwang/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,alvintpwang/hostboot,csmart/hostboot,open-power/hostboot,alvintpwang/hostboot,csmart/hostboot,csmart/hostboot,open-power/hostboot,open-power/hostboot,alvintpwang/hostboot,csmart/hostboot