Fix after moving vars to Stepper::

Author: dbuezas

Marlin/src/gcode/feature/advance/M900.cpp

@@ -111,7 +111,7 @@ void GcodeSuite::M900() {
         const float tau = parser.value_float();
         if (WITHIN(tau, 0, .5)) {
           planner.synchronize();
-          planner.set_advance_tau(tau);
+          Stepper::set_advance_tau(tau);
         }
         else
           echo_value_oor('U');

Marlin/src/lcd/menu/menu_tune.cpp

@@ -31,6 +31,7 @@
 #include "menu_item.h"
 #include "../../module/motion.h"
 #include "../../module/planner.h"
+#include "../../module/stepper.h"
 #include "../../module/temperature.h"
 #include "../../MarlinCore.h"