Use bit flags for homed/known

Marlin/src/lcd/dogm/status_screen_lite_ST7920.h

@@ -868,9 +868,7 @@ void ST7920_Lite_Status_Screen::update_status_or_position(bool forceUpdate) {
         #if ENABLED(DISABLE_REDUCED_ACCURACY_WARNING)
           true
         #else
-          axis_known_position[X_AXIS] &&
-          axis_known_position[Y_AXIS] &&
-          axis_known_position[Z_AXIS]
+          all_axes_known()
         #endif
       );
     }