iwlagn: add coex debug flag

Replace IWL_DEBUG_AP with IWL_DEBUG_COEX for debug COEX related stuffs
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>

drivers/net/wireless/iwlwifi/iwl-debug.h

@@ -131,7 +131,7 @@ static inline void iwl_dbgfs_unregister(struct iwl_priv *priv)
 #define IWL_DL_ASSOC		(1 << 12)
 #define IWL_DL_DROP		(1 << 13)
 #define IWL_DL_TXPOWER		(1 << 14)
-#define IWL_DL_AP		(1 << 15)
+#define IWL_DL_COEX		(1 << 15)
 /* 0x000F0000 - 0x00010000 */
 #define IWL_DL_FW		(1 << 16)
 #define IWL_DL_RF_KILL		(1 << 17)
@@ -171,7 +171,7 @@ static inline void iwl_dbgfs_unregister(struct iwl_priv *priv)
 #define IWL_DEBUG_DROP(p, f, a...)	IWL_DEBUG(p, IWL_DL_DROP, f, ## a)
 #define IWL_DEBUG_DROP_LIMIT(p, f, a...)	\
 		IWL_DEBUG_LIMIT(p, IWL_DL_DROP, f, ## a)
-#define IWL_DEBUG_AP(p, f, a...)	IWL_DEBUG(p, IWL_DL_AP, f, ## a)
+#define IWL_DEBUG_COEX(p, f, a...)	IWL_DEBUG(p, IWL_DL_COEX, f, ## a)
 #define IWL_DEBUG_TXPOWER(p, f, a...)	IWL_DEBUG(p, IWL_DL_TXPOWER, f, ## a)
 #define IWL_DEBUG_RATE(p, f, a...)	IWL_DEBUG(p, IWL_DL_RATE, f, ## a)
 #define IWL_DEBUG_RATE_LIMIT(p, f, a...)	\