[PM] Fix a stale comment after my last refactoring spoted by Joey in
review!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195757 91177308-0d34-0410-b5e6-96231b3b80d8
Darwin-ARM: use movw/movt for static relocations

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195759 91177308-0d34-0410-b5e6-96231b3b80d8