If CONFIG_ATH9K=y, the following errors will be seen while compiling
gpio.c

drivers/net/wireless/ath/ath9k/gpio.o: In function `ath_deinit_leds':
gpio.c:(.text+0x604): undefined reference to `led_classdev_unregister'
gpio.c:(.text+0x604): relocation truncated to fit: R_AARCH64_CALL26
against undefined symbol `led_classdev_unregister'
drivers/net/wireless/ath/ath9k/gpio.o: In function `ath_init_leds':
gpio.c:(.text+0x708): undefined reference to `led_classdev_register_ext'
gpio.c:(.text+0x708): relocation truncated to fit: R_AARCH64_CALL26
against undefined symbol `led_classdev_register_ext'

Reported-by: Hulk Robot <redacted>
Signed-off-by: Zhang Jianhua <redacted>

---
v2:
add 'select NEW_LEDS'
---
 drivers/net/wireless/ath/ath9k/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wireless/ath/ath9k/Kconfig b/drivers/net/wireless/ath/ath9k/Kconfig
index e150d82eddb6..0a73ede3148a 100644
--- a/drivers/net/wireless/ath/ath9k/Kconfig
+++ b/drivers/net/wireless/ath/ath9k/Kconfig

@@ -24,6 +24,8 @@ config ATH9K
 	select MAC80211_LEDS if LEDS_CLASS=y || LEDS_CLASS=MAC80211
 	select ATH9K_HW
 	select ATH9K_COMMON
+	select NEW_LEDS
+	select LEDS_CLASS
 	help
 	  This module adds support for wireless adapters based on
 	  Atheros IEEE 802.11n AR5008, AR9001 and AR9002 family

-- 
2.17.1