Try to get the firmware from the linux-firmware git tree git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git copy the firmwares in ath10k/QCA6174/hw3.0/ to /lib/firmware/ It should help.
Try to get the firmware from the linux-firmware git tree //git.kernel. org/pub/ scm/linux/ kernel/ git/firmware/ linux-firmware. git QCA6174/ hw3.0/ to /lib/firmware/
git:
copy the firmwares in ath10k/
It should help.