[ARM] Do not fuse VADD and VMUL, continued (2/2)

This is patch 2/2, following up on D53314, and is the functional change
to prevent fusing mul + add sequences into VFMAs.

Differential revision: https://reviews.llvm.org/D53315


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@344683 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed