[Bug target/54019] [SH] Tail calls with -fPIC use bsrf instead of braf

[olegendo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54019

--- Comment #3 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Kazumoto Kojima from comment #2)
> Confirmed.

Assuming my theories in comment #1 are correct, I guess to fix/improve this it
would require similar mechanisms as mentioned in PR 12306