cfg80211: merge documentations of field "debugfsdir"

The field "privid" is documented twice. Comments were more or less the
same. The patch merge them.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200221115604.594035-7-Jerome.Pouiller@silabs.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/cfg80211.h

@@ -4462,8 +4462,8 @@ struct wiphy_iftype_akm_suites {
  *	the same number of arbitrary MAC addresses.
  * @registered: protects ->resume and ->suspend sysfs callbacks against
  *	unregister hardware
- * @debugfsdir: debugfs directory used for this wiphy, will be renamed
- *	automatically on wiphy renames
+ * @debugfsdir: debugfs directory used for this wiphy (ieee80211/<wiphyname>).
+ *	It will be renamed automatically on wiphy renames
  * @dev: (virtual) struct device for this wiphy
  * @wext: wireless extension handlers
  * @priv: driver private data (sized according to wiphy_new() parameter)
@@ -4689,7 +4689,6 @@ struct wiphy {
 
 	bool registered;
 
-	/* dir in debugfs: ieee80211/<wiphyname> */
 	struct dentry *debugfsdir;
 
 	const struct ieee80211_ht_cap *ht_capa_mod_mask;