Usually Download file at https://wireless.wiki.kernel.org/en/users/drivers/ath9k
1. Download backports driver
2. make ath driver
3. copy ath folder to LTIB/rpm/BUILD/linux/driver/net/wireless
4. make menuconfig - set ath9k module enable
5. build linux kernel(uImage)
6. up uImage on Sabre board using MFG tool.
I can't confirm ath module on SABRE board (use lsmod)
how to enable wireless module?