Revert of Reland: Remove register index/code indirection

src/arm64/simulator-arm64.h

Index: src/arm64/simulator-arm64.h
diff --git a/src/arm64/simulator-arm64.h b/src/arm64/simulator-arm64.h
index 3d7c15cfd0053f8d8374d832081bac3253506090..a86a7add666005475791aaabd256d7eec28ec7a1 100644
--- a/src/arm64/simulator-arm64.h
+++ b/src/arm64/simulator-arm64.h
@@ -16,6 +16,12 @@
 #include "src/assembler.h"
 #include "src/globals.h"
 #include "src/utils.h"
+
+#define REGISTER_CODE_LIST(R)                                                  \
+R(0)  R(1)  R(2)  R(3)  R(4)  R(5)  R(6)  R(7)                                 \
+R(8)  R(9)  R(10) R(11) R(12) R(13) R(14) R(15)                                \
+R(16) R(17) R(18) R(19) R(20) R(21) R(22) R(23)                                \
+R(24) R(25) R(26) R(27) R(28) R(29) R(30) R(31)
 
 namespace v8 {
 namespace internal {