Updating ATTR_PROC_CHIP_MEM_TO_USE to use all bits of group and chip ID

When first created, we assumed the group ID and chip ID's were
both 2 bits, but they're actually 3. This is updating the attribute.

Change-Id: Iabc112f7202d410bd7bceab53c3ad79a1df17368
RTC:176434
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/56039
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Sachin Gupta <sgupta2m@in.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@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: William G. Hoffa <wghoffa@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/56498

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

@@ -754,7 +754,7 @@
 
 <attribute>
   <id>ATTR_PROC_CHIP_MEM_TO_USE</id>
-  <targetType>TARGET_TYPE_SYSTEM</targetType>
+  <targetType>TARGET_TYPE_PROC_CHIP</targetType>
   <description>This attribute denotes where our master proc's memory is
     located. In the case that the master-proc does not have usable memory,
     we are going to use another proc's memory to boot. The attribute will be