[Bug target/77571] __clear_cache is broken on arm64 for big.little where the cache line sizes are different between cores

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77571

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
really there needs to be no caching at all because the code could migrate
between the cores.