Revert "[Thumb] Reapply r272251 with a fix for PR28348"

This reverts commit r274510 - it made green dragon unhappy.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274512 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed