Fix previous commit: [FastISel][AArch64] Simplify XALU multiplies.

When folding the intrinsic flag into the branch or select we also have to
consider the fact if the intrinsic got simplified, because it changes the
flag we have to check for.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218034 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "[FastISel][AArch64] Fold bit test and branch into TBZ and TBNZ."

Reverting it until I have time to investigate a regression.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218035 91177308-0d34-0410-b5e6-96231b3b80d8