Fix a warning in GCC about a pointless typedef.

llvm-svn: 100268
diff --git a/llvm/utils/TableGen/ARMDecoderEmitter.cpp b/llvm/utils/TableGen/ARMDecoderEmitter.cpp
index 4bb4602..5fb8b6b 100644
--- a/llvm/utils/TableGen/ARMDecoderEmitter.cpp
+++ b/llvm/utils/TableGen/ARMDecoderEmitter.cpp
@@ -100,7 +100,7 @@
 #undef ENTRY
 }
 
-typedef enum {
+enum {
   IndexModeNone = 0,
   IndexModePre  = 1,
   IndexModePost = 2,