[Bug target/120405] bfloat16-complex.c fails with -mcpu=neoverse-v2 but works with -mcpu=cortex-a57

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120405

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111876#c4 describes what is going
on and why -march=armv8-a works but -march=armv8.2-a does not (it is due to the
enabling for fp16). And yes this is an exact dup, `reduced from
"bfloat16-complex.c"`.