[Bug target/67391] [SH] Convert clrt addc to normal add insn

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67391

--- Comment #34 from Oleg Endo <olegendo at gcc dot gnu.org> ---
The patches for this PR (r228176, r228201) have triggered PR 70416.