Fix disabled wifi crash on boot (#5370)

esphome/components/wifi/wifi_component.cpp

@@ -40,6 +40,9 @@ void WiFiComponent::setup() {
   if (this->enable_on_boot_) {
     this->start();
   } else {
+#ifdef USE_ESP32
+    esp_netif_init();
+#endif
     this->state_ = WIFI_COMPONENT_STATE_DISABLED;
   }
 }