batman-adv: Prefix unicast defines with BATADV_

Reported-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
index c8da6b0..8098320 100644
--- a/net/batman-adv/unicast.c
+++ b/net/batman-adv/unicast.c
@@ -98,7 +98,7 @@
 	int i;
 	struct frag_packet_list_entry *tfp;
 
-	for (i = 0; i < FRAG_BUFFER_SIZE; i++) {
+	for (i = 0; i < BATADV_FRAG_BUFFER_SIZE; i++) {
 		tfp = kmalloc(sizeof(*tfp), GFP_ATOMIC);
 		if (!tfp) {
 			batadv_frag_list_free(head);