[Bug target/91050] -mdejagnu-cpu= does not affect the -m assembler option

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91050

--- Comment #12 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Ah, common/config/aarch64/aarch64-common.c .