[turbofan]: Elide extra move when accessing stack or frame register

src/arm64/frames-arm64.cc

Index: src/arm64/frames-arm64.cc
diff --git a/src/arm64/frames-arm64.cc b/src/arm64/frames-arm64.cc
index 73c678aaa6a9b6de3a3fe60cf7fdbec85981808e..240b5b7bc48109c0876cc98b4ab96bcce4ab7904 100644
--- a/src/arm64/frames-arm64.cc
+++ b/src/arm64/frames-arm64.cc
@@ -15,7 +15,8 @@ namespace v8 {
 namespace internal {
 
 
-Register JavaScriptFrame::fp_register() { return v8::internal::fp; }
+Register StandardFrame::sp_register() { return v8::internal::jssp; }
+Register StandardFrame::fp_register() { return v8::internal::fp; }
 Register JavaScriptFrame::context_register() { return cp; }
 Register JavaScriptFrame::constant_pool_pointer_register() {
   UNREACHABLE();