ath9k: update kconfig to indicate support for AR9002 family

ath9k supports the AR9002 family of chipsets. This includes
the AR9285 and the miniPCI AR9223 and AR9220 (which themselves
have AR9280+AR5133).

We now refer people to the wiki page as it seems this is not
as popular as we would have hoped.
Reported-by: NJD <jd1008@gmail.com>
Cc: Dakota Lee <Dakota.Lee@Atheros.com>
Signed-off-by: NLuis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/Kconfig

@@ -6,7 +6,13 @@ config ATH9K
 	select NEW_LEDS
 	---help---
 	  This module adds support for wireless adapters based on
-	  Atheros IEEE 802.11n AR5008 and AR9001 family of chipsets.
+	  Atheros IEEE 802.11n AR5008, AR9001 and AR9002 family
+	  of chipsets. For a specific list of supported external
+	  cards, laptops that already ship with these cards and
+	  APs that come with these cards refer to to ath9k wiki
+	  products page:
+
+	  http://wireless.kernel.org/en/users/Drivers/ath9k/products
 
 	  If you choose to build a module, it'll be called ath9k.