MachineRegisterInfo can access TII off of the MachineFunction's
subtarget and so doesn't need the TargetMachine or to access via
getSubtargetImpl. Update all callers.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227160 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed