mt76: mt7612 5 GHz channels width when using as mesh backhaul

Using 17.01. I've been using the 5GHz on the mt7612 for a mesh backhaul (802.11s) and noticed when I change channels and set the vht that the width does not change and is stuck at 80MHz, I have used the lower channels 36-48 and the upper 149-161. I have also set channel 165 that is suppose to be 20 MHz (Does not matter if I set it to 20/40 or 80 VHT in the /etc/config/wireless on any channels), when I capture on charts from our spectrum analyser it shows that both lower and upper channels appear to be stuck at 80 MHz width and when I use 165 it appears it is 40MHz and not 20MHz width. Has anyone else captured charts to verify that the channel width change accordingly.

Start by reproducing the mt7612 5 GHz mesh-backhaul setup from /etc/config/wireless across channels 36–48, 149–161, and 165, using the reported VHT settings. Compare the configured width with spectrum-analyzer captures; done means the observed width matches the selected channel and configuration.