Rename A64 port to ARM64 port

src/arm64/decoder-arm64.h

Index: src/arm64/decoder-arm64.h
diff --git a/src/a64/decoder-a64.h b/src/arm64/decoder-arm64.h
similarity index 98%
rename from src/a64/decoder-a64.h
rename to src/arm64/decoder-arm64.h
index 22a7e3547bed232672af16a5a66e3b36344e977e..e48f741bf51cabf317bf7bf72d4365f05e5ceae1 100644
--- a/src/a64/decoder-a64.h
+++ b/src/arm64/decoder-arm64.h
@@ -25,13 +25,13 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_A64_DECODER_A64_H_
-#define V8_A64_DECODER_A64_H_
+#ifndef V8_ARM64_DECODER_ARM64_H_
+#define V8_ARM64_DECODER_ARM64_H_
 
 #include <list>
 
 #include "globals.h"
-#include "a64/instructions-a64.h"
+#include "arm64/instructions-arm64.h"
 
 namespace v8 {
 namespace internal {
@@ -207,4 +207,4 @@ class Decoder : public V {
 
 } }  // namespace v8::internal
 
-#endif  // V8_A64_DECODER_A64_H_
+#endif  // V8_ARM64_DECODER_ARM64_H_