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/bat_sysfs.c b/net/batman-adv/bat_sysfs.c
index 5dce1ab..31d23db 100644
--- a/net/batman-adv/bat_sysfs.c
+++ b/net/batman-adv/bat_sysfs.c
@@ -326,7 +326,7 @@
 static void post_gw_deselect(struct net_device *net_dev)
 {
 	struct bat_priv *bat_priv = netdev_priv(net_dev);
-	gw_deselect(bat_priv);
+	batadv_gw_deselect(bat_priv);
 }
 
 static ssize_t show_gw_mode(struct kobject *kobj, struct attribute *attr,
@@ -397,7 +397,7 @@
 	bat_info(net_dev, "Changing gw mode from: %s to: %s\n",
 		 curr_gw_mode_str, buff);
 
-	gw_deselect(bat_priv);
+	batadv_gw_deselect(bat_priv);
 	atomic_set(&bat_priv->gw_mode, (unsigned int)gw_mode_tmp);
 	return count;
 }