Use raw_ostream throughout the AsmPrinter.

llvm-svn: 55092
diff --git a/llvm/lib/Target/PowerPC/PPC.h b/llvm/lib/Target/PowerPC/PPC.h
index b9f6483..9a8e22e 100644
--- a/llvm/lib/Target/PowerPC/PPC.h
+++ b/llvm/lib/Target/PowerPC/PPC.h
@@ -25,10 +25,11 @@
   class PPCTargetMachine;
   class FunctionPass;
   class MachineCodeEmitter;
+  class raw_ostream;
   
 FunctionPass *createPPCBranchSelectionPass();
 FunctionPass *createPPCISelDag(PPCTargetMachine &TM);
-FunctionPass *createPPCAsmPrinterPass(std::ostream &OS,
+FunctionPass *createPPCAsmPrinterPass(raw_ostream &OS,
                                       PPCTargetMachine &TM);
 FunctionPass *createPPCCodeEmitterPass(PPCTargetMachine &TM,
                                        MachineCodeEmitter &MCE);