fix PPC.h to not pull in TargetMachine.h


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119072 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPC.h b/lib/Target/PowerPC/PPC.h
index 67e3a4a..b4644a1 100644
--- a/lib/Target/PowerPC/PPC.h
+++ b/lib/Target/PowerPC/PPC.h
@@ -18,12 +18,12 @@
 // GCC #defines PPC on Linux but we use it as our namespace name
 #undef PPC
 
-#include "llvm/Target/TargetMachine.h"
-
 namespace llvm {
   class PPCTargetMachine;
   class FunctionPass;
   class formatted_raw_ostream;
+  class JITCodeEmitter;
+  class Target;
   
 FunctionPass *createPPCBranchSelectionPass();
 FunctionPass *createPPCISelDag(PPCTargetMachine &TM);