Rename A64 port to ARM64 port

src/atomicops.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 142 matching lines @@
 
 } }  // namespace v8::internal
 
 // Include our platform specific implementation.
 #if defined(THREAD_SANITIZER)
 #include "atomicops_internals_tsan.h"
 #elif defined(_MSC_VER) && (V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64)
 #include "atomicops_internals_x86_msvc.h"
 #elif defined(__APPLE__)
 #include "atomicops_internals_mac.h"
-#elif defined(__GNUC__) && V8_HOST_ARCH_A64
-#include "atomicops_internals_a64_gcc.h"
+#elif defined(__GNUC__) && V8_HOST_ARCH_ARM64
+#include "atomicops_internals_arm64_gcc.h"
 #elif defined(__GNUC__) && V8_HOST_ARCH_ARM
 #include "atomicops_internals_arm_gcc.h"
 #elif defined(__GNUC__) && (V8_HOST_ARCH_IA32 || V8_HOST_ARCH_X64)
 #include "atomicops_internals_x86_gcc.h"
 #elif defined(__GNUC__) && V8_HOST_ARCH_MIPS
 #include "atomicops_internals_mips_gcc.h"
 #else
 #error "Atomic operations are not supported on your platform"
 #endif
 
 // On some platforms we need additional declarations to make
 // AtomicWord compatible with our other Atomic* types.
 #if defined(__APPLE__) || defined(__OpenBSD__)
 #include "atomicops_internals_atomicword_compat.h"
 #endif
 
 #endif  // V8_ATOMICOPS_H_