-mmmx and -msse are broken [unreviewed patch attached - 3.0 regression]

[Kelley Cook]

>The -msse and -mmmx flags seem broken and cause an ICE.
>I just tested this on: http://www.codesourcery.com/gcc-compile.shtml

>Should these flags be disabled for the upcoming gcc 3.0 release?

I certainly thought so, so I wrote the simple attached patch for the GCC 
3.0 branch which is still awaiting review.

I just checked and it still applies cleanly and bootstraps the 
gcc-3.0-200010527 tarball.

After the patch is applied, attempting to use either option will
cause the same "unsupported option" behavior that 2.95.x did.

Kelley Cook <no checkin privledges>