mac80211: ath10k: add board.bin file again

This file is still needed with the new firmware.

This fixes r38835.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@38843 3c298f89-4303-0410-b956-a3cf2f4a3e73