Help with building OpenWrt for TP-Link EAP235 Wall with mt76/7615 'patch'

Easiest way is to create a patches/ directory in package/kernel/mt76/ and drop that hack in there. Then compile.

No need to use the mt76 git repo, but if you'd like to (which greatly complicates things here, but hey), see these instructions. You can translate those to the mt76 package almost one on one.