Revert "[ARM] Lower lower saturate to 0 and lower saturate to -1 using bit-operations"

Miscompiles code. Testcase pending.

This reverts commit r323869.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323929 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed