pan/genxml: Remove surface descriptors on v6/v7

Those don't exist on Bifrost.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Eric R. Smith <eric.smith@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31440>

src/panfrost/lib/genxml/v6.xml

@@ -617,10 +617,6 @@
     <field name="Thread Storage" size="64" start="28:0" type="address"/>
   </struct>
 
-  <struct name="Surface" align="8">
-    <field name="Pointer" size="64" start="0:0" type="address"/>
-  </struct>
-
   <struct name="Surface With Stride" align="8">
     <field name="Pointer" size="64" start="0:0" type="address"/>
     <field name="Row stride" size="32" start="2:0" type="int"/>

src/panfrost/lib/genxml/v7.xml

@@ -673,10 +673,6 @@
     <field name="Thread Storage" size="64" start="28:0" type="address"/>
   </struct>
 
-  <struct name="Surface" align="8">
-    <field name="Pointer" size="64" start="0:0" type="address"/>
-  </struct>
-
   <struct name="Surface With Stride" align="16">
     <field name="Pointer" size="64" start="0:0" type="address"/>
     <field name="Row stride" size="32" start="2:0" type="int"/>