atheros: add common debug printing

ath9k uses this for now, ath9k_htc is expected to re-use this
as well. We lave ath5k as is, but it certainly can also be
converted later.

The ath9k module parameter and debugfs entry is kept.

Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/Kconfig b/drivers/net/wireless/ath/Kconfig
index 11ded15..6ce86cb 100644
--- a/drivers/net/wireless/ath/Kconfig
+++ b/drivers/net/wireless/ath/Kconfig
@@ -16,7 +16,15 @@
 	  http://wireless.kernel.org/en/users/Drivers/Atheros
 
 if ATH_COMMON
+
+config ATH_DEBUG
+	bool "Atheros wireless debugging"
+	---help---
+	  Say Y, if you want to debug atheros wireless drivers.
+	  Right now only ath9k makes use of this.
+
 source "drivers/net/wireless/ath/ath5k/Kconfig"
 source "drivers/net/wireless/ath/ath9k/Kconfig"
 source "drivers/net/wireless/ath/ar9170/Kconfig"
+
 endif