BTW2, I found a webpage describing a situation that ath10k driver for 3.14.64 kernel does not support QCA6174A, and the writer found a way to amend the problem. The key is to download “compat-wireless-2017-09-25.tar.xz” from “http://mirror2.openwrt.org/sources/” and build it for Android 6.0.
Maybe this webpage can provide some helpful info. It’s written in Chinese and have code examples and screen snapshots. I hope you can grab some idea by Google translation and guessing.
FYI.