Revert `rL321667: [PPC64] Port to ppc64le - initial version`

Differential Revision: https://reviews.llvm.org/D41386

git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@321678 91177308-0d34-0410-b5e6-96231b3b80d8
10 files changed