ath9k: change DFS logging to use ath_dbg()

The DFS pattern detector was initially planned to reside on
a higher layer and used generic pr_*() logging functions.

Being part of ath9k, use ath_dbg() instead and make DFS log
ouput selectable via ATH_DBG_DFS (0x20000) at runtime.

This patch does not contain functional modifications.

Signed-off-by: Zefir Kurtisi <zefir.kurtisi@neratec.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 3be2eb0..6b275e0 100644
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -577,7 +577,7 @@
 	atomic_set(&ah->intr_ref_cnt, -1);
 	sc->sc_ah = ah;
 
-	sc->dfs_detector = dfs_pattern_detector_init(NL80211_DFS_UNSET);
+	sc->dfs_detector = dfs_pattern_detector_init(ah, NL80211_DFS_UNSET);
 
 	if (!pdata) {
 		ah->ah_flags |= AH_USE_EEPROM;