[Bug target/115713] rs6000: Miss warning for incompatible no-altivec and vsx in target attribute

[linkw at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115713

--- Comment #6 from Kewen Lin <linkw at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #5)
> The docs are at least imprecise.  Surely command-line -maltivec with
> target ("no-vsx") shouldn't revert to whatever is default with the target
> opts.

Thanks for confirming, I'll update the affected test case.