Revert "[AMDGPU] Widened vector length for global/constant address space."

This reverts commit ce988cc100dc65e7c6c727aff31ceb99231cab03.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@326907 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed