[Bug target/65266] [SH] Use rotcl for bit reversals

[law at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65266

--- Comment #1 from Jeffrey A. Law <law at gcc dot gnu.org> ---
So I took at peek at this as it looked like it might be an interesting missed
optimization case for one my interns.