intel/genxml: generate video headers

This just generates the video engine pieces.

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13788>

src/intel/genxml/meson.build

@@ -54,7 +54,7 @@ foreach f : gen_xml_files + ['gen_rt.xml']
     _name,
     input : ['gen_pack_header.py', f],
     output : _name,
-    command : [prog_python, '@INPUT@', '--engines=render,blitter'],
+    command : [prog_python, '@INPUT@', '--engines=render,blitter,video'],
     capture : true,
   )
 endforeach