Fixes to node IPC messaging to handling non-zero base addresses

This is 1st phase which adds an Attribute as a container to
preserve the calculated addresses across an MPIPL.

Change-Id: I610b11b320331a82260fe790a8680a2a98bf992b
RTC:191463
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/58942
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Prachi Gupta <pragupta@us.ibm.com>
Reviewed-by: William G. Hoffa <wghoffa@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

src/usr/targeting/common/xmltohb/attribute_types_hb.xml

@@ -1141,4 +1141,18 @@
     <writeable/>
 </attribute>
 
+<attribute>
+    <id>IPC_NODE_BUFFER_GLOBAL_ADDRESS</id>
+    <description>Global IPC Buffer Addresseses for each Node
+        dimension: node number (0:7)
+    </description>
+    <simpleType>
+        <uint64_t></uint64_t>
+        <array>8</array>
+    </simpleType>
+    <persistency>volatile-zeroed</persistency>
+    <readable />
+    <writeable />
+</attribute>
+
 </attributes>

src/usr/targeting/common/xmltohb/target_types_hb.xml

@@ -48,6 +48,7 @@
     <attribute><id>ALLOW_ATTR_OVERRIDES_IN_SECURE_MODE</id></attribute>
     <attribute><id>HIDDEN_ERRLOGS_ENABLE</id></attribute>
     <attribute><id>CHKSTOP_ANALYSIS_ON_STARTUP</id></attribute>
+    <attribute><id>IPC_NODE_BUFFER_GLOBAL_ADDRESS</id></attribute>
 </targetTypeExtension>
 
 <targetTypeExtension>