move global SET_SPEED_NA to function that uses it (#20026)

selfdrive/ui/paint.cc

@@ -214,6 +214,7 @@ static void ui_draw_world(UIState *s) {
 }
 
 static void ui_draw_vision_maxspeed(UIState *s) {
+  const int SET_SPEED_NA = 255;
   float maxspeed = s->scene.controls_state.getVCruise();
   const bool is_cruise_set = maxspeed != 0 && maxspeed != SET_SPEED_NA;
   if (is_cruise_set && !s->is_metric) { maxspeed *= 0.6225; }

selfdrive/ui/ui.hpp

@@ -61,8 +61,6 @@ const int UI_FREQ = 20;   // Hz
 const int MODEL_PATH_MAX_VERTICES_CNT = TRAJECTORY_SIZE*2;
 const int TRACK_POINTS_MAX_CNT = TRAJECTORY_SIZE*4;
 
-const int SET_SPEED_NA = 255;
-
 typedef enum NetStatus {
   NET_CONNECTED,
   NET_DISCONNECTED,