You never read Support Fritzbox 7490 (Post #63, it's a direct link), this thread, the PR for the 3390 or my commit message, did you? Because if you read at least one of it, you would know that the WiFi chips are not connected to the Lantiq target, hence there is no WiFi on the Lantiq. I'm not going to explain it once again. Read and learn. After you've understood how it works we can sort out the details.