verify done.

verification procedure:

1. find a machine that load ath10k module. install cosmic and make sure kernel 
module ath10k module is loaded.
2. apt update; apt upgrade.
3. rename the board-2.bin, reboot, and make sure wifi failed. (it means: the 
firmware is needed for the driver work properly). and then rename back. (at 
this time, linux-firmware version is: 1.175.1)
4. turn on the proposed channel, install linux-firmware 1.175.3.
5. make sure the md5sum for the board-2.bin is updated.
6. reboot, and confirm wifi still working well.

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  To add power setting bin file for SAR support (QCA6174)

Status in HWE Next:
  Fix Released
Status in OEM Priority Project:
Status in linux-firmware package in Ubuntu:
  Fix Released
Status in linux-firmware source package in Bionic:
  Fix Committed
Status in linux-firmware source package in Cosmic:
  Fix Committed

Bug description:
  To meet the policy requirement of the RF radiation, we need to reduce the 
power of the device.

  Qualcomm provides a new firmware for this.
  97b1f938 ath10k: QCA6174 hw3.0: update board-2.bin

  We can't verify it.

  [Regression Potential]
  Low, it's a fix from upstream.

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