Revert r205194 - [mips] Removed R_MIPS_GOT. It's identical to   R_MIPS_GOT16.

There's a couple additional bits I missed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205195 91177308-0d34-0410-b5e6-96231b3b80d8