Rename A64 port to ARM64 port

src/arm64/disasm-arm64.cc

Index: src/arm64/disasm-arm64.cc
diff --git a/src/a64/disasm-a64.cc b/src/arm64/disasm-arm64.cc
similarity index 99%
rename from src/a64/disasm-a64.cc
rename to src/arm64/disasm-arm64.cc
index bc3cbcd861683d5273c846d5abc34332ac61d9fb..ed3e928796bde139229ac22ff5c7f8476b65bd6a 100644
--- a/src/a64/disasm-a64.cc
+++ b/src/arm64/disasm-arm64.cc
@@ -32,11 +32,11 @@
 
 #include "v8.h"
 
-#if V8_TARGET_ARCH_A64
+#if V8_TARGET_ARCH_ARM64
 
 #include "disasm.h"
-#include "a64/decoder-a64-inl.h"
-#include "a64/disasm-a64.h"
+#include "arm64/decoder-arm64-inl.h"
+#include "arm64/disasm-arm64.h"
 #include "macro-assembler.h"
 #include "platform.h"
 
@@ -1782,13 +1782,13 @@ const char* NameConverter::NameOfCPURegister(int reg) const {
 
 
 const char* NameConverter::NameOfByteCPURegister(int reg) const {
-  UNREACHABLE();  // A64 does not have the concept of a byte register
+  UNREACHABLE();  // ARM64 does not have the concept of a byte register
   return "nobytereg";
 }
 
 
 const char* NameConverter::NameOfXMMRegister(int reg) const {
-  UNREACHABLE();  // A64 does not have any XMM registers
+  UNREACHABLE();  // ARM64 does not have any XMM registers
   return "noxmmreg";
 }
 
@@ -1853,4 +1853,4 @@ void Disassembler::Disassemble(FILE* file, byte* start, byte* end) {
 
 }  // namespace disasm
 
-#endif  // V8_TARGET_ARCH_A64
+#endif  // V8_TARGET_ARCH_ARM64