ath9k_hw: add support for parsing PA predistortion related EEPROM fields

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index 09dd7be..9d09216 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -200,6 +200,7 @@
 	ATH9K_HW_CAP_LDPC			= BIT(19),
 	ATH9K_HW_CAP_FASTCLOCK			= BIT(20),
 	ATH9K_HW_CAP_SGI_20			= BIT(21),
+	ATH9K_HW_CAP_PAPRD			= BIT(22),
 };
 
 enum ath9k_capability_type {