Firmware files for ath10k, a mac80211 driver for QCA988x. The directory structure is:
ath10k: the default firmware files, copy this directory structure to your firmware file location, most likely /lib/firmware/
10.1: firmware images from the 10.1 firmware branch, primary use case AP mode, STA specific features might not work
main: firmware images from the “main” firmware branch, primary use case STA mode
For more information check the wiki: