[Bug target/124366] assemble failure of wrussq with -masm=intel

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124366

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 63835
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63835&action=edit
gcc16-pr124366.patch

Untested fix.