Add ATTR_ prefix to attributes missing it in hb_customized_attrs.xml

Change-Id: Ia8e169913ca5c5964e196605a405ead5d9dc10bb
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/56085
Reviewed-by: Prachi Gupta <pragupta@us.ibm.com>
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: Elizabeth K. Liner <eliner@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>

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

@@ -688,16 +688,16 @@
     </attribute>
 
     <attribute>
-        <id>CEN_MSS_CACHE_ENABLE</id>
+        <id>ATTR_CEN_MSS_CACHE_ENABLE</id>
         <no_export/>
         <default>0x1</default>
     </attribute>
     <attribute>
-        <id>LINK_TRAIN</id>
+        <id>ATTR_LINK_TRAIN</id>
         <writeable/>
     </attribute>
     <attribute>
-        <id>SKIP_WAKEUP</id>
+        <id>ATTR_SKIP_WAKEUP</id>
         <persistency>volatile-zeroed</persistency>
     </attribute>