[Bug target/98172] Update -mtune=generic for the current Intel and AMD processors

[hubicka at ucw dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98172

--- Comment #5 from Jan Hubicka <hubicka at ucw dot cz> ---
> Hmm, but rep movsb is only fast starting with Zen3 IIRC.
Yep, I think we need to support zen1/2 well. I think we can regress
buldozers somehwat though.

Honza