Revert "[ARM] Constant Materialize: imms with specific value can be encoded into mov.w"

This reverts commit r277610 / d619aa8878c3dafcc0d29a46517f63ff3209fdd4.

This make subtarget-no-movt.ll fail in
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_check/26892,

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277654 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed