batman-adv: Prefix hard-interface non-static functions with batadv_

batman-adv can be compiled as part of the kernel instead of an module. In that
case the linker will see all non-static symbols of batman-adv and all other
non-static symbols of the kernel. This could lead to symbol collisions. A
prefix for the batman-adv symbols that defines their private namespace avoids
such a problem.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index bb8557e..7324b89 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -221,7 +221,7 @@
 
 	memcpy(tt_local_entry->common.addr, addr, ETH_ALEN);
 	tt_local_entry->common.flags = NO_FLAGS;
-	if (is_wifi_iface(ifindex))
+	if (batadv_is_wifi_iface(ifindex))
 		tt_local_entry->common.flags |= TT_CLIENT_WIFI;
 	atomic_set(&tt_local_entry->common.refcount, 2);
 	tt_local_entry->last_seen = jiffies;