batman-adv: fix checkpatch string complaint

Regression introduced by: f76d019194e0a88c57371df169ecc979690a04c2

Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>

net/batman-adv/bat_iv_ogm.c

@@ -1061,8 +1061,8 @@ static void bat_iv_ogm_process(const struct ethhdr *ethhdr,
 
 	if (batman_ogm_packet->flags & NOT_BEST_NEXT_HOP) {
 		bat_dbg(DBG_BATMAN, bat_priv,
-			"Drop packet: ignoring all packets not forwarded from "
-			"the best next hop (sender: %pM)\n", ethhdr->h_source);
+			"Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n",
+			ethhdr->h_source);
 		return;
 	}