Enable SBE Updates with Config flag and Attribute

In fsprelease.config, keep 'unset NO_SBE_UPDATES'
In genHwsvMrwXml.pl, push @systemAttr, ["SBE_UPDATE_DISABLE", 0]
In attribute_types.xml, <default>0</default> for SBE_UPDATE_DISABLE

Change-Id: I4521a9f58d97d9dc63613e186619f2c6e66ba2c1
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/37661
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP Build CI <op-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/genHwsvMrwXml.pl

@@ -361,7 +361,7 @@
     "IVRM_VIN_MAX_MV", $reqPol->{'ivrm_vin_max_mv'},
     "IVRM_STEP_DELAY_NS", $reqPol->{'ivrm_step_delay_ns'},
     "IVRM_STABILIZATION_DELAY_NS", $reqPol->{'ivrm_stabilization_delay_ns'},
-    "SBE_UPDATE_DISABLE", 1,
+    "SBE_UPDATE_DISABLE", 0,
 ];
 
 if ($reqPol->{'system_resclk_enable'} eq 'ON')

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

@@ -20425,6 +20425,7 @@ Measured in GB</description>
     </description>
     <simpleType>
         <uint8_t>
+          <default>0</default>
         </uint8_t>
     </simpleType>
     <hwpfToHbAttrMap>