Adding OpenWrt support for ZTE MF286 3g/4g wifi router

Not correct, but I see the culprit. Can you dump the "caldata" MTD partition and upload it somewhere for me to check? I think we need some device tree tweaks to actually make it work. Too bad I don't have such a weird device to test myself.

Edit: please try this image: https://drive.google.com/drive/folders/1z5K_PF4asc8zQ0HG68eUsnfwhq1Cb2gn?usp=drive_link
If it works - i.e. both interfaces probe, I'll submit the fix upstream.