Fix typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210947 91177308-0d34-0410-b5e6-96231b3b80d8
The hazard recognizer only needs a subtarget, not a target machine
so make it take one. Fix up all users accordingly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210948 91177308-0d34-0410-b5e6-96231b3b80d8