Revert r335297 "[X86] Implement more of x86-64 large and medium PIC code models"

MCJIT can't handle R_X86_64_GOT64 yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335300 91177308-0d34-0410-b5e6-96231b3b80d8
13 files changed