batman-adv: Rename batadv_hardif *_free_ref function to *_put

The batman-adv source code is the only place in the kernel which uses the
*_free_ref naming scheme for the *_put functions. Changing it to *_put
makes it more consistent and makes it easier to understand the connection
to the *_get functions.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>
diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c
index 5b573d1..476554b 100644
--- a/net/batman-adv/main.c
+++ b/net/batman-adv/main.c
@@ -287,7 +287,7 @@
 	seq_printf(seq,
 		   "BATMAN mesh %s disabled - primary interface not active\n",
 		   net_dev->name);
-	batadv_hardif_free_ref(primary_if);
+	batadv_hardif_put(primary_if);
 	primary_if = NULL;
 
 out: