ath9k: Do not select MAC80211_LEDS by default

The ath9k driver hides all LEDs related code behind CONFIG_MAC80211_LEDS
ifdefs so it does not really require the MAC80211_LEDS.  The code builds
fine.  Convert the "select" into "imply" to allow disabling LED trigger
when not needed.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200820194049.28055-1-krzk@kernel.org

drivers/net/wireless/ath/ath9k/Kconfig

@@ -22,10 +22,10 @@ config ATH9K
 	tristate "Atheros 802.11n wireless cards support"
 	depends on MAC80211 && HAS_DMA
 	select ATH9K_HW
-	select MAC80211_LEDS
-	select LEDS_CLASS
-	select NEW_LEDS
 	select ATH9K_COMMON
+	imply NEW_LEDS
+	imply LEDS_CLASS
+	imply MAC80211_LEDS
 	help
 	  This module adds support for wireless adapters based on
 	  Atheros IEEE 802.11n AR5008, AR9001 and AR9002 family