More PPC32 -> PPC changes, as well as merging some classes that were
redundant after the change.

llvm-svn: 23759
diff --git a/llvm/lib/Target/PowerPC/PPCInstrBuilder.h b/llvm/lib/Target/PowerPC/PPCInstrBuilder.h
index ab774e2..b97178f 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrBuilder.h
+++ b/llvm/lib/Target/PowerPC/PPCInstrBuilder.h
@@ -1,4 +1,4 @@
-//===-- PowerPCInstrBuilder.h - Aides for building PPC insts ----*- C++ -*-===//
+//===-- PPCInstrBuilder.h - Aides for building PPC insts --------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //