batman-adv: Use common declaration order in *_send_skb_(packet|unicast)

Signed-off-by: Antonio Quartulli <antonio@open-mesh.com>
diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index fa70ae8..23635bd 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -255,8 +255,8 @@
 			    struct batadv_orig_node *orig_node,
 			    unsigned short vid)
 {
-	struct ethhdr *ethhdr;
 	struct batadv_unicast_packet *unicast_packet;
+	struct ethhdr *ethhdr;
 	int ret = NET_XMIT_DROP;
 
 	if (!orig_node)