batman-adv: Keep includes ordered by filename

It is easier to detect if a include is already there for a used
functionality when the includes are ordered. Using an alphabetic order
together with the grouping in commit 1e2c2a4fe4a5 ("batman-adv: Add
required includes to all files") makes includes better manageable.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index cd83e28..38f9e55 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -181,12 +181,12 @@
 #include <linux/cpumask.h>
 #include <linux/etherdevice.h>
 #include <linux/if_ether.h> /* for packet.h */
+#include <linux/if_vlan.h>
+#include <linux/jiffies.h>
 #include <linux/netdevice.h>
+#include <linux/percpu.h>
 #include <linux/printk.h>
 #include <linux/types.h>
-#include <linux/percpu.h>
-#include <linux/jiffies.h>
-#include <linux/if_vlan.h>
 
 #include "types.h"