Default SUPPORTED_STOP_STATES to correct value

  - Prior only stop 0 was enabled.  Enable all states
    supported by HW

Change-Id: I3719eedda823e65c9ec84013f1967a636a159470
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/46176
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: Gregory S. Still <stillgs@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>

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

@@ -4355,7 +4355,7 @@
     <readable></readable>
     <simpleType>
       <uint32_t>
-        <default>0x80000000</default>
+        <default>0xEC100000</default>
       </uint32_t>
     </simpleType>
   </attribute>