[MachineRegisterInfo] Get rid of the global-isel ifdefs.
One additional pointer is not a big deal size-wise and it makes
the code much nicer!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262856 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed