objtype: Wrap .__name__ handling in MICROPY_CPYTHON_COMPAT.

Because it's runtime reflection feature, not required for many apps.
Rant time:
Python could really use better str() vs repr() distinction, for example,
repr(type) could be "<class 'foo'>" (as it is now), and str(type) just
"foo". But alas, getting straight name requires adhoc attribute.

py/objtype.c

@@ -297,10 +297,12 @@ STATIC mp_obj_t type_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj
 STATIC void type_load_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
     assert(MP_OBJ_IS_TYPE(self_in, &mp_type_type));
     mp_obj_type_t *self = self_in;
+#if MICROPY_CPYTHON_COMPAT
     if (attr == MP_QSTR___name__) {
         dest[0] = MP_OBJ_NEW_QSTR(self->name);
         return;
     }
+#endif
     mp_obj_t member = mp_obj_class_lookup(self, attr);
     if (member != MP_OBJ_NULL) {
         // check if the methods are functions, static or class methods