ath9k: add AR9580 support

This has been tested in STA and AP mode by Florian.

Cc: David Quan <dquan@qca.qualcomm.com>
Cc: Kathy Giori <kgiori@qca.qualcomm.com>
Cc: Senthil Balasubramanian <senthilb@qca.qualcomm.com>
Tested-by: NFlorian Fainelli <florian@openwrt.org>
Signed-off-by: NLuis R. Rodriguez <mcgrof@qca.qualcomm.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/pci.c

@@ -32,6 +32,7 @@ static DEFINE_PCI_DEVICE_TABLE(ath_pci_id_table) = {
 	{ PCI_VDEVICE(ATHEROS, 0x002E) }, /* PCI-E */
 	{ PCI_VDEVICE(ATHEROS, 0x0030) }, /* PCI-E  AR9300 */
 	{ PCI_VDEVICE(ATHEROS, 0x0032) }, /* PCI-E  AR9485 */
+	{ PCI_VDEVICE(ATHEROS, 0x0033) }, /* PCI-E  AR9580 */
 	{ 0 }
 };