ARM: add a couple more NEON predicates.

The fused multiply instructions were added in VFPv4 but are still NEON
instructions, in particular they shouldn't be available on a Cortex-M4 not
matter how floaty it is.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193342 91177308-0d34-0410-b5e6-96231b3b80d8