changed LL_READ_BACK call to LV_LL_READ_BACK
as we don't have `LL_READ_BACK` function anymore. I changed it to `LV_LL_READ_BACK`.
@@ -848,7 +848,7 @@ static void lv_chart_draw_areas(lv_obj_t * chart, const lv_area_t * mask)
style.line.width = ext->series.width;
/*Go through all data lines*/
- LL_READ_BACK(ext->series_ll, ser) {
+ LV_LL_READ_BACK(ext->series_ll, ser) {
style.line.color = ser->color;
p1.x = 0 + x_ofs;
