RNG: Add 'ppc64le' arch and newer pseries-2.* machine types

Acked-by: NJán Tomko <jtomko@redhat.com>
Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com>

docs/schemas/basictypes.rng

@@ -333,6 +333,7 @@
       <value>parisc64</value>
       <value>ppc</value>
       <value>ppc64</value>
+      <value>ppc64le</value>
       <value>ppcemb</value>
       <value>s390</value>
       <value>s390x</value>

docs/schemas/domaincommon.rng

@@ -412,13 +412,18 @@
     <group>
       <optional>
         <attribute name="arch">
+          <choice>
             <value>ppc64</value>
+            <value>ppc64le</value>
+          </choice>
         </attribute>
       </optional>
       <optional>
         <attribute name="machine">
           <choice>
             <value>pseries</value>
+            <value>pseries-2.1</value>
+            <value>pseries-2.2</value>
           </choice>
         </attribute>
       </optional>