batman-adv: remove obsolete variable primary_iface from orig_node

This variable became obsolete when changing to the new bonding mechanism
based on the multi interface optimization. Since its not used anywhere,
remove it.
Reported-by: Linus Lüssing <linus.luessing@web.de>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>

net/batman-adv/types.h

@@ -199,7 +199,6 @@ struct batadv_orig_bat_iv {
 /**
  * struct batadv_orig_node - structure for orig_list maintaining nodes of mesh
  * @orig: originator ethernet address
- * @primary_addr: hosts primary interface address
  * @ifinfo_list: list for routers per outgoing interface
  * @last_bonding_candidate: pointer to last ifinfo of last used router
  * @batadv_dat_addr_t:  address of the orig node in the distributed hash
@@ -244,7 +243,6 @@ struct batadv_orig_bat_iv {
  */
 struct batadv_orig_node {
 	uint8_t orig[ETH_ALEN];
-	uint8_t primary_addr[ETH_ALEN];
 	struct hlist_head ifinfo_list;
 	struct batadv_orig_ifinfo *last_bonding_candidate;
 #ifdef CONFIG_BATMAN_ADV_DAT