L3 updates -- p9_build_smp, p9_fbc_utils

p9_build_smp:
  constrain FFDC collection at 16 chips (current max size for P9 based systems)
  scrub node references, replace with group
  clarify X link requirements based on pump mode
  review and complete callouts

p9_fbc_utils:
  add feature attribute to support pb_init sampling on NDD2+
  replace locally defined bit constants with SCOM header file constants

Change-Id: Icb2a2d4ab67a18537048ffef12203a1642efae06
Original-Change-Id: Ib1f71488ffd07580a647709d9227112f7d73384f
CQ: HW328175
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/40308
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Reviewed-by: Thi N. Tran <thi@us.ibm.com>
Tested-by: PPE CI <ppe-ci+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Reviewed-by: DHRUVARAJ SUBHASH CHANDRAN <dhruvaraj@in.ibm.com>
Reviewed-by: Matt K. Light <mklight@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/55515
CI-Ready: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Tested-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/import/chips/p9/procedures/xml/attribute_info/chip_ec_attributes.xml

@@ -358,6 +358,24 @@
     </chipEcFeature>
   </attribute>
   <!-- ******************************************************************** -->
+  <attribute>
+    <id>ATTR_CHIP_EC_FEATURE_HW328175</id>
+    <targetType>TARGET_TYPE_PROC_CHIP</targetType>
+    <description>
+       HW328175 : PB mode register does not reflect steady-state value
+       of PB init
+    </description>
+    <chipEcFeature>
+      <chip>
+        <name>ENUM_ATTR_NAME_NIMBUS</name>
+        <ec>
+          <value>0x20</value>
+          <test>LESS_THAN</test>
+        </ec>
+      </chip>
+    </chipEcFeature>
+  </attribute>
+  <!-- ******************************************************************** -->
   <attribute>
     <id>ATTR_CHIP_EC_FEATURE_HW367321</id>
     <targetType>TARGET_TYPE_PROC_CHIP</targetType>