radv: fix xfb query copy param ordering
Fixes: afff9dd0 ("radv: Use correct buffer size for query pool result copies.") Reviewed-by:Samuel Pitoiset <samuel.pitoiset@gmail.com> Reviewed-by:
Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Part-of: <mesa/mesa!14422> (cherry picked from commit 05a5e5a2)