[Bug target/77974] m68k bootstrap failure due to -Werror=implicit-fallthrough

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77974

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Nice.  Will you commit the patch?  Thanks.