TF: Disable Win64 as a TurboFan target until calling conventions are sorted out.

R=danno@chromium.org
BUG=

Review URL: https://codereview.chromium.org/423713003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22760 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler/pipeline.h

@@ -14,10 +14,14 @@
 
 #if V8_TARGET_ARCH_IA32 || V8_TARGET_ARCH_X64 || V8_TARGET_ARCH_ARM64 || \
     V8_TARGET_ARCH_ARM
+#ifndef _WIN64
 #define V8_TURBOFAN_TARGET 1
 #else
 #define V8_TURBOFAN_TARGET 0
 #endif
+#else
+#define V8_TURBOFAN_TARGET 0
+#endif
 
 namespace v8 {
 namespace internal {