svml: fix a few feature tests
svml: fix a few feature tests

These functions require AVX-512F, so on my desktop (which doesn't
support AVX-512F) they were giving illegal instruction errors.  I
wouldn't be surprised if there are some functions which require
earlier instruction sets that are also wrong, but I don't really
have a way to test for them.

nemequ/simde,nemequ/simde,nemequ/simde