Set TPM model to be the x75 nuvoton for axone simics

Current axone simics model has this as the x75. This might change
but for now we will set it to be x75 in the hostboot xml so we
dont get error logs.

Change-Id: I7d86bb36cbb31fd4bae02a7e7f29bc3f385fd6d8
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/70827
Reviewed-by: Michael Baiocchi <mbaiocch@us.ibm.com>
Reviewed-by: Hieu C. Nguyen <hieu.nguyen@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: Daniel M. Crowell <dcrowell@us.ibm.com>

src/usr/targeting/common/xmltohb/simics_AXONE.system.xml

@@ -3998,6 +3998,10 @@
         <id>TPM_ROLE</id>
         <default>TPM_PRIMARY</default>
     </attribute>
+    <attribute>
+      <id>TPM_MODEL</id>
+      <default>2</default>
+    </attribute>
 </targetInstance>
 
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