Rename A64 port to ARM64 port

src/arm64/lithium-codegen-arm64.h

Index: src/arm64/lithium-codegen-arm64.h
diff --git a/src/a64/lithium-codegen-a64.h b/src/arm64/lithium-codegen-arm64.h
similarity index 98%
rename from src/a64/lithium-codegen-a64.h
rename to src/arm64/lithium-codegen-arm64.h
index c58ca13ed6d4fd0ab2af6293a94001cae50b4dc9..f4213051870e05e2f2589c07d2a2ae629dcd61a5 100644
--- a/src/a64/lithium-codegen-a64.h
+++ b/src/arm64/lithium-codegen-arm64.h
@@ -25,12 +25,12 @@
 // (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_LITHIUM_CODEGEN_A64_H_
-#define V8_A64_LITHIUM_CODEGEN_A64_H_
+#ifndef V8_ARM64_LITHIUM_CODEGEN_ARM64_H_
+#define V8_ARM64_LITHIUM_CODEGEN_ARM64_H_
 
-#include "a64/lithium-a64.h"
+#include "arm64/lithium-arm64.h"
 
-#include "a64/lithium-gap-resolver-a64.h"
+#include "arm64/lithium-gap-resolver-arm64.h"
 #include "deoptimizer.h"
 #include "lithium-codegen.h"
 #include "safepoint-table.h"
@@ -454,7 +454,7 @@ class LDeferredCode: public ZoneObject {
 // the branch when the inverted condition is verified.
 //
 // For actual examples of condition see the concrete implementation in
-// lithium-codegen-a64.cc (e.g. BranchOnCondition, CompareAndBranch).
+// lithium-codegen-arm64.cc (e.g. BranchOnCondition, CompareAndBranch).
 class BranchGenerator BASE_EMBEDDED {
  public:
   explicit BranchGenerator(LCodeGen* codegen)
@@ -473,4 +473,4 @@ class BranchGenerator BASE_EMBEDDED {
 
 } }  // namespace v8::internal
 
-#endif  // V8_A64_LITHIUM_CODEGEN_A64_H_
+#endif  // V8_ARM64_LITHIUM_CODEGEN_ARM64_H_