[Bug target/79646] Typos in vax.opt

[macro at orcam dot me.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79646

Maciej W. Rozycki <macro at orcam dot me.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |macro at orcam dot me.uk
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #7 from Maciej W. Rozycki <macro at orcam dot me.uk> ---
Fixed as per the commit message.  Closing bug.