ath10k-firmware: Fix QCA6174 support

ath10k-firmware: Fix QCA6174 support

Currently when installing the firmware, a bunch of files and directories
that the ath10k driver does not look for are created.

The package now installs firmware for both hw 2.1 and 3.0 devices.
2.1 is abandonware but may be useful to keep.

3.0 firmware was tested on a Killer 1535 to be relatively stable with
802.11w disabled. 802.11w causes multiple firmware crashes but that's true
of other ath10k firmwares as well.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
(backported and squashed from
 27eab4fa578d696ab55b6264a1b35fad6488b664,
 d0fbe1956b3b9f07b6dcb54a8ed43a4904581e1d,
 e191c7ee797c8b3458eb9791212a56b16febeeb4)
Signed-off-by: Jo-Philipp Wich <jo@mein.io>