ath9k: Add hardware support for QCA9531

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --cc drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
Simple merge

diff --cc drivers/net/wireless/ath/ath9k/ar9003_phy.c
Simple merge

diff --cc drivers/net/wireless/ath/ath9k/hw.c
Simple merge

diff --cc drivers/net/wireless/ath/ath9k/recv.c
Simple merge