[Bug bootstrap/93229] simplify_count_trailing_zeroes doesn't compile on x86_64-pc-linux-gnu

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93229

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks like a missing check to see if it is scalar int mode.