Brazos FSI workarounds
Brazos FSI workarounds

Two changes in here:
1) Ignore 2 error bits that are turned on at FSP standby and
never get cleared.
2) Avoid using xscom to do direct master operations so that we
never use the flipped alt-master ports.
See CQ SW224509 for more information.

Change-Id: I12591fd9e7b368393ac8d062ab6bee7ba34d02c7
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/6560
Tested-by: Jenkins Server
Reviewed-by: Dean Sanner <3b8f978f111a0718dcf88848e092ac780da17ab3@us.ibm.com>
Reviewed-by: A. Patrick Williams III <c87e37b1a4035affd737b461af89fb722d635f4d@us.ibm.com>

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