[X86] Move some vector InstAliases out from under unnecessary 'let Predicates'. NFCI

We don't have any assembler predicates for vector ISAs so this isn't necessary. It just adds extra lines and identation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353631 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed