[FS#3544] 5GHz band of several ath10k devices are completely unusable (Attachment added)

[OpenWrt Bugs]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Reimu NotMoe (ReimuNotMoe) 

Attached to Project - OpenWrt/LEDE Project
Summary - 5GHz band of several ath10k devices are completely unusable
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Critical
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - - Device: Custom router board with mini PCIE slots
- Software version: OpenWrt SNAPSHOT r0-7e4585e
- Steps to reproduce:
 * Git clone https://github.com/openwrt/openwrt then build with default configuration + enable ath10k & fw.
 * Install an ath10k card (tested: QCA9880, QCA6174) on router board, and flash image to device.
 * Run `iw list` and every 5GHz band is disabled.

Changing country code via LuCI and `iw reg set` won't help.

Using ath10k-ct won't help as well.

ath9k is not affected.

Logs are in attachments.

One or more files have been attached.

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3544

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