batman-adv: Prefix gateway-client 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/soft-interface.c b/net/batman-adv/soft-interface.c
index 16e866a..bfc4fe0 100644
--- a/net/batman-adv/soft-interface.c
+++ b/net/batman-adv/soft-interface.c
@@ -181,14 +181,14 @@
 		case GW_MODE_SERVER:
 			/* gateway servers should not send dhcp
 			 * requests into the mesh */
-			ret = gw_is_dhcp_target(skb, &header_len);
+			ret = batadv_gw_is_dhcp_target(skb, &header_len);
 			if (ret)
 				goto dropped;
 			break;
 		case GW_MODE_CLIENT:
 			/* gateway clients should send dhcp requests
 			 * via unicast to their gateway */
-			ret = gw_is_dhcp_target(skb, &header_len);
+			ret = batadv_gw_is_dhcp_target(skb, &header_len);
 			if (ret)
 				do_bcast = false;
 			break;
@@ -232,7 +232,7 @@
 	/* unicast packet */
 	} else {
 		if (atomic_read(&bat_priv->gw_mode) != GW_MODE_OFF) {
-			ret = gw_out_of_range(bat_priv, skb, ethhdr);
+			ret = batadv_gw_out_of_range(bat_priv, skb, ethhdr);
 			if (ret)
 				goto dropped;
 		}