ARM64: Add NEON support

src/arm64/code-stubs-arm64.h

Index: src/arm64/code-stubs-arm64.h
diff --git a/src/arm64/code-stubs-arm64.h b/src/arm64/code-stubs-arm64.h
index 4b56b5468f9b976a2794fc6b97b43f33cdda6b3a..6a5d8520b9cc05f88d2e86819ab2b4ca82fea225 100644
--- a/src/arm64/code-stubs-arm64.h
+++ b/src/arm64/code-stubs-arm64.h
@@ -172,14 +172,12 @@ class RecordWriteStub: public PlatformCodeStub {
   // The 'object' and 'address' registers must be preserved.
   class RegisterAllocation {
    public:
-    RegisterAllocation(Register object,
-                       Register address,
-                       Register scratch)
+    RegisterAllocation(Register object, Register address, Register scratch)
         : object_(object),
           address_(address),
           scratch0_(scratch),
           saved_regs_(kCallerSaved),
-          saved_fp_regs_(kCallerSavedFP) {
+          saved_fp_regs_(kCallerSavedV) {
       DCHECK(!AreAliased(scratch, object, address));
 
       // The SaveCallerSaveRegisters method needs to save caller-saved