PM: initialize flag HWP attributes to 0

- ATTR_PM_SPWUP_IGNORE_XSTOP_FLAG and ATTR_PM_FIRINIT_DONE_ONCE_FLAG

Change-Id: Ic1890febab23418558b2118c207e31670f5961e8
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/41538
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Dev-Ready: Gregory S. Still <stillgs@us.ibm.com>
Reviewed-by: Prem Shanker Jha <premjha2@in.ibm.com>
Reviewed-by: RANGANATHPRASAD G. BRAHMASAMUDRA <prasadbgr@in.ibm.com>
Reviewed-by: Matt K. Light <mklight@us.ibm.com>
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/41539
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>

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

@@ -78,6 +78,7 @@
       checkstop condition.
       </description>
       <valueType>uint8</valueType>
+      <initToZero/>
       <writeable/>
   </attribute>
   <!-- ********************************************************************* -->
@@ -112,6 +113,7 @@
           reset value
       </description>
       <valueType>uint8</valueType>
+      <initToZero/>
       <writeable/>
   </attribute>
   <!-- ********************************************************************* -->