Sink AddrMode back into TargetLowering, removing one of the most

peculiar headers under include/llvm.

This struct still doesn't make a lot of sense, but it makes more sense
down in TargetLowering than it did before.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171739 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/CodeGenPrepare.cpp

@@ -823,7 +823,7 @@ namespace {
 
 /// ExtAddrMode - This is an extended version of TargetLowering::AddrMode
 /// which holds actual Value*'s for register values.
-struct ExtAddrMode : public AddrMode {
+struct ExtAddrMode : public TargetLowering::AddrMode {
   Value *BaseReg;
   Value *ScaledReg;
   ExtAddrMode() : BaseReg(0), ScaledReg(0) {}