docs(arduino): update tick setup (#5832)

docs/integration/framework/arduino.rst

@@ -41,7 +41,6 @@ installed, follow these configuration steps:
 2. Go to ``lvgl`` and copy ``lv_conf_template.h`` as ``lv_conf.h`` into the Arduino Libraries directory next to the ``lvgl`` library folder.
 3. Open ``lv_conf.h`` and change the first ``#if 0`` to ``#if 1`` to enable the content of the file
 4. Set the color depth of you display in :c:macro:`LV_COLOR_DEPTH`
-5. Set :c:macro:`LV_TICK_CUSTOM`
 
 Finally the layout with ``lv_conf.h`` should look like this:
 

examples/arduino/LVGL_Arduino/LVGL_Arduino.ino

@@ -77,6 +77,9 @@ void setup()
 
     lv_init();
 
+    /*Set a tick source so that LVGL will know how much time elapsed. */
+    lv_tick_set_cb(millis);
+
     /* register print function for debugging */
 #if LV_USE_LOG != 0
     lv_log_register_print_cb( my_print );
@@ -127,6 +130,5 @@ void setup()
 void loop()
 {
     lv_task_handler(); /* let the GUI do its work */
-    lv_tick_inc(5); /* tell LVGL how much time has passed */
     delay(5); /* let this time pass */
 }