[X86] Don't mark addressing mode operands as "outs". NFC-ish.

Nothing in-tree can tell the difference, but it's incorrect: the
addressing mode registers aren't what's defined.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275426 91177308-0d34-0410-b5e6-96231b3b80d8