ARM64: re-enable turbofan tests.

The tests were already passing.

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/513253002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@23514 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/cctest/compiler/test-changes-lowering.cc

@@ -303,10 +303,7 @@ TEST(RunChangeBitToBool) {
 }
 
 
-#ifndef V8_TARGET_ARCH_ARM64
 #if V8_TURBOFAN_BACKEND
-// TODO(titzer): disabled on ARM64 because calling into the runtime to
-// allocate uses the wrong stack pointer.
 // TODO(titzer): disabled on ARM
 
 TEST(RunChangeInt32ToTaggedSmi) {
@@ -411,4 +408,3 @@ TEST(RunChangeFloat64ToTagged) {
 }
 
 #endif  // V8_TURBOFAN_BACKEND
-#endif  // !V8_TARGET_ARCH_ARM64