[Bug target/71235] march=silvermont turns on aes by default

[tjoener at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71235

--- Comment #4 from Jan De Kock <tjoener at gmail dot com> ---
@Jakub, isn't that the whole point? To be the lowest common denominator?

In the case of silvermont, the desktop SKUs (Bay-Trail-D) and mobile SKUs
(Bay-Trail-M), both don't support AES. That's a pretty large group if you ask
me