wifi: mac80211: debug: omit link if non-MLO connection

If we don't really have multiple links, omit the link ID from
link debug prints, otherwise we change the format for all of
the existing drivers (most of which might never support MLO),
and also have extra noise in the logs.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/debug.h

@@ -135,14 +135,33 @@ do {									\
 	_sdata_dbg(1, sdata, fmt, ##__VA_ARGS__)
 
 #define link_info(link, fmt, ...)					\
-	_sdata_info((link)->sdata, "[link %d] " fmt, (link)->link_id,	\
-		    ##__VA_ARGS__)
+	do {								\
+		if ((link)->sdata->vif.valid_links)			\
+			_sdata_info((link)->sdata, "[link %d] " fmt,	\
+				    (link)->link_id,			\
+				    ##__VA_ARGS__);			\
+		else							\
+			_sdata_info((link)->sdata, fmt, ##__VA_ARGS__);	\
+	} while (0)
 #define link_err(link, fmt, ...)					\
-	_sdata_err((link)->sdata, "[link %d] " fmt, (link)->link_id,	\
-		   ##__VA_ARGS__)
+	do {								\
+		if ((link)->sdata->vif.valid_links)			\
+			_sdata_err((link)->sdata, "[link %d] " fmt,	\
+				   (link)->link_id,			\
+				   ##__VA_ARGS__);			\
+		else							\
+			_sdata_err((link)->sdata, fmt, ##__VA_ARGS__);	\
+	} while (0)
 #define link_dbg(link, fmt, ...)					\
-	_sdata_dbg(1, (link)->sdata, "[link %d] " fmt, (link)->link_id,	\
-		   ##__VA_ARGS__)
+	do {								\
+		if ((link)->sdata->vif.valid_links)			\
+			_sdata_dbg(1, (link)->sdata, "[link %d] " fmt,	\
+				   (link)->link_id,			\
+				   ##__VA_ARGS__);			\
+		else							\
+			_sdata_dbg(1, (link)->sdata, fmt,		\
+				   ##__VA_ARGS__);			\
+	} while (0)
 
 #define ht_dbg(sdata, fmt, ...)						\
 	_sdata_dbg(MAC80211_HT_DEBUG,					\