Move X86RegisterInfo away from using the TargetMachine and only
using the subtarget.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210595 91177308-0d34-0410-b5e6-96231b3b80d8
Remove the use of TargetMachine from X86InstrInfo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210596 91177308-0d34-0410-b5e6-96231b3b80d8