8136525: Generate interpreter entries only once and avoid unnecessary jump to jump

Reviewed-by: coleenp, twisti, aph

hotspot/src/cpu/x86/vm/cppInterpreter_x86.cpp

@@ -807,7 +807,7 @@ address InterpreterGenerator::generate_Reference_get_entry(void) {
 
   // If G1 is not enabled then attempt to go through the accessor entry point
   // Reference.get is an accessor
-  return generate_jump_to_normal_entry();
+  return NULL;
 }
 
 //