[Bug target/97585] Improve documentation for -march=x86-64 to say MMX, SSE, SSE2 are implied

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97585

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2023-07-10

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.