lcd: don't turn on disp in init

Closes https://github.com/espressif/esp-idf/issues/8516

examples/peripherals/lcd/i80_controller/main/i80_controller_example_main.c

@@ -191,6 +191,9 @@ void app_main(void)
     // the gap is LCD panel specific, even panels with the same driver IC, can have different gap value
     esp_lcd_panel_set_gap(panel_handle, 0, 20);
 
+    // user can flush pre-defined pattern to the screen before we turn on the screen or backlight
+    ESP_ERROR_CHECK(esp_lcd_panel_disp_on_off(panel_handle, true));
+
     ESP_LOGI(TAG, "Turn on LCD backlight");
     gpio_set_level(EXAMPLE_PIN_NUM_BK_LIGHT, EXAMPLE_LCD_BK_LIGHT_ON_LEVEL);