py: Add finer configuration of static funcs when not in stackless mode.

Also rename call_args_t to mp_call_args_t.
diff --git a/py/vm.c b/py/vm.c
index dc4f9c2..0472901 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -906,7 +906,7 @@
                         code_state->sp = sp;
                         code_state->exc_sp = MP_TAGPTR_MAKE(exc_sp, currently_in_except_block);
 
-                        call_args_t out_args;
+                        mp_call_args_t out_args;
                         mp_call_prepare_args_n_kw_var(false, unum, sp, &out_args);
 
                         mp_code_state *new_state = mp_obj_fun_bc_prepare_codestate(out_args.fun,
@@ -977,7 +977,7 @@
                         code_state->sp = sp;
                         code_state->exc_sp = MP_TAGPTR_MAKE(exc_sp, currently_in_except_block);
 
-                        call_args_t out_args;
+                        mp_call_args_t out_args;
                         mp_call_prepare_args_n_kw_var(true, unum, sp, &out_args);
 
                         mp_code_state *new_state = mp_obj_fun_bc_prepare_codestate(out_args.fun,