Fix ARM64 port after r22876.

src/compiler/linkage.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/linkage.h"
 
 #include "src/code-stubs.h"
 #include "src/compiler.h"
 #include "src/compiler/node.h"
 #include "src/compiler/pipeline.h"
@@ skipping 87 matching lines @@
     Operator::Property properties,
     CallDescriptor::DeoptimizationSupport can_deoptimize) {
   return GetRuntimeCallDescriptor(function, parameter_count, properties,
                                   can_deoptimize, this->info_->zone());
 }
 
 
 //==============================================================================
 // Provide unimplemented methods on unsupported architectures, to at least link.
 //==============================================================================
-#if !V8_TURBOFAN_TARGET
+#if !V8_TURBOFAN_BACKEND
 CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) {
   UNIMPLEMENTED();
   return NULL;
 }
 
 
 CallDescriptor* Linkage::GetRuntimeCallDescriptor(
     Runtime::FunctionId function, int parameter_count,
     Operator::Property properties,
     CallDescriptor::DeoptimizationSupport can_deoptimize, Zone* zone) {
   UNIMPLEMENTED();
   return NULL;
 }
 
 
 CallDescriptor* Linkage::GetStubCallDescriptor(
     CodeStubInterfaceDescriptor* descriptor, int stack_parameter_count) {
   UNIMPLEMENTED();
   return NULL;
 }
 
 
 CallDescriptor* Linkage::GetSimplifiedCDescriptor(
     Zone* zone, int num_params, MachineRepresentation return_type,
     const MachineRepresentation* param_types) {
   UNIMPLEMENTED();
   return NULL;
 }
-#endif  // !V8_TURBOFAN_TARGET
+#endif  // !V8_TURBOFAN_BACKEND
 }
 }
 }  // namespace v8::internal::compiler