wifi: mac80211: provide link ID in link_conf

It might be useful to drivers to be able to pass only the
link_conf pointer, rather than both the pointer and the
link_id; add the link_id to the link_conf to facility that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

include/net/mac80211.h

@@ -516,6 +516,7 @@ struct ieee80211_fils_discovery {
  * to that BSS) that can change during the lifetime of the BSS.
  *
  * @addr: (link) address used locally
+ * @link_id: link ID, or 0 for non-MLO
  * @htc_trig_based_pkt_ext: default PE in 4us units, if BSS supports HE
  * @uora_exists: is the UORA element advertised by AP
  * @ack_enabled: indicates support to receive a multi-TID that solicits either
@@ -639,6 +640,7 @@ struct ieee80211_fils_discovery {
  */
 struct ieee80211_bss_conf {
 	const u8 *bssid;
+	unsigned int link_id;
 	u8 addr[ETH_ALEN] __aligned(2);
 	u8 htc_trig_based_pkt_ext;
 	bool uora_exists;

net/mac80211/iface.c

@@ -390,6 +390,7 @@ static void ieee80211_link_init(struct ieee80211_sub_if_data *sdata,
 	link->sdata = sdata;
 	link->link_id = link_id;
 	link->conf = link_conf;
+	link_conf->link_id = link_id;
 
 	INIT_WORK(&link->csa_finalize_work,
 		  ieee80211_csa_finalize_work);