[Bug target/70957] testsuite/gcc.target/powerpc/vsx-elemrev-4.c fails on power7

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70957

--- Comment #6 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
The test also passed on P7 at the time I committed the patch.