[Bug target/91148] PowerPC build gets several warnings due to -Wformat-diag

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91148

--- Comment #5 from Segher Boessenkool <segher at gcc dot gnu.org> ---
I have a patch removing "builtin function" where that is redundant.