Rename A64 port to ARM64 port

src/arm64/cpu-arm64.h

Index: src/arm64/cpu-arm64.h
diff --git a/src/a64/cpu-a64.h b/src/arm64/cpu-arm64.h
similarity index 92%
rename from src/a64/cpu-a64.h
rename to src/arm64/cpu-arm64.h
index 969312b3c41ba1575abf70271daaa0504ab37c95..ddec72d8f68f571c59fa7e66152558a8bc213a64 100644
--- a/src/a64/cpu-a64.h
+++ b/src/arm64/cpu-arm64.h
@@ -25,8 +25,8 @@
 // (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_CPU_A64_H_
-#define V8_A64_CPU_A64_H_
+#ifndef V8_ARM64_CPU_ARM64_H_
+#define V8_ARM64_CPU_ARM64_H_
 
 #include <stdio.h>
 #include "serialize.h"
@@ -47,13 +47,13 @@ class CpuFeatures : public AllStatic {
   // Check whether a feature is supported by the target CPU.
   static bool IsSupported(CpuFeature f) {
     ASSERT(initialized_);
-    // There are no optional features for A64.
+    // There are no optional features for ARM64.
     return false;
   };
 
   static bool IsFoundByRuntimeProbingOnly(CpuFeature f) {
     ASSERT(initialized_);
-    // There are no optional features for A64.
+    // There are no optional features for ARM64.
     return false;
   }
 
@@ -69,13 +69,13 @@ class CpuFeatures : public AllStatic {
   static unsigned supported_;
 
   static bool VerifyCrossCompiling() {
-    // There are no optional features for A64.
+    // There are no optional features for ARM64.
     ASSERT(cross_compile_ == 0);
     return true;
   }
 
   static bool VerifyCrossCompiling(CpuFeature f) {
-    // There are no optional features for A64.
+    // There are no optional features for ARM64.
     USE(f);
     ASSERT(cross_compile_ == 0);
     return true;
@@ -104,4 +104,4 @@ class CpuFeatures : public AllStatic {
 
 } }  // namespace v8::internal
 
-#endif  // V8_A64_CPU_A64_H_
+#endif  // V8_ARM64_CPU_ARM64_H_