TailDuplication: Don't pass MMI separately from MF. NFC

MMI must match the function passed, and MF has a handle on MMI. Use that instead
of accepting it as separate argument. No Functional Change.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@279701 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed