batman-adv: Prefix icmp-socket 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 5b5feb4..7525e4f 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -289,7 +289,7 @@
 
 	/* add data to device queue */
 	if (icmp_packet->msg_type != ECHO_REQUEST) {
-		bat_socket_receive_packet(icmp_packet, icmp_len);
+		batadv_socket_receive_packet(icmp_packet, icmp_len);
 		goto out;
 	}