Fix these enums' starting values to reflect the way that
instruction opcodes are now numbered. No functionality change.

llvm-svn: 56497
diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.h b/llvm/lib/Target/PowerPC/PPCISelLowering.h
index e514e0f..c0c2224 100644
--- a/llvm/lib/Target/PowerPC/PPCISelLowering.h
+++ b/llvm/lib/Target/PowerPC/PPCISelLowering.h
@@ -24,7 +24,7 @@
   namespace PPCISD {
     enum NodeType {
       // Start the numbering where the builtin ops and target ops leave off.
-      FIRST_NUMBER = ISD::BUILTIN_OP_END+PPC::INSTRUCTION_LIST_END,
+      FIRST_NUMBER = ISD::BUILTIN_OP_END,
 
       /// FSEL - Traditional three-operand fsel node.
       ///