batman-adv: Prefix soft-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/routing.c b/net/batman-adv/routing.c
index d7d05b2..0e98221 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -982,7 +982,8 @@
 
 	/* packet for me */
 	if (is_my_mac(unicast_packet->dest)) {
-		interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size);
+		batadv_interface_rx(recv_if->soft_iface, skb, recv_if,
+				    hdr_size);
 		return NET_RX_SUCCESS;
 	}
 
@@ -1018,8 +1019,8 @@
 		if (!new_skb)
 			return NET_RX_SUCCESS;
 
-		interface_rx(recv_if->soft_iface, new_skb, recv_if,
-			     sizeof(struct unicast_packet));
+		batadv_interface_rx(recv_if->soft_iface, new_skb, recv_if,
+				    sizeof(struct unicast_packet));
 		return NET_RX_SUCCESS;
 	}
 
@@ -1104,7 +1105,7 @@
 		goto out;
 
 	/* broadcast for me */
-	interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size);
+	batadv_interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size);
 	ret = NET_RX_SUCCESS;
 	goto out;