intel/genxml: Add gen12 tile cache flush bit

Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>

src/intel/genxml/gen12.xml

@@ -6364,6 +6364,7 @@
       <value name="GGTT" value="1"/>
     </field>
     <field name="Flush LLC" start="58" end="58" type="bool"/>
+    <field name="Tile Cache Flush Enable" start="60" end="60" type="bool"/>
     <field name="Address" start="66" end="111" type="address"/>
     <field name="Immediate Data" start="128" end="191" type="uint"/>
   </instruction>