batman-adv: Switch to linux/array_size.h

The commit 3cd39bc3 ("kernel.h: Move ARRAY_SIZE() to a separate
header") introduced a new header for the ARRAY_SIZE macro which was
previously exposed via linux/kernel.h.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

net/batman-adv/main.c

@@ -6,6 +6,7 @@
 
 #include "main.h"
 
+#include <linux/array_size.h>
 #include <linux/atomic.h>
 #include <linux/build_bug.h>
 #include <linux/byteorder/generic.h>
@@ -20,7 +21,6 @@
 #include <linux/init.h>
 #include <linux/ip.h>
 #include <linux/ipv6.h>
-#include <linux/kernel.h>
 #include <linux/kobject.h>
 #include <linux/kref.h>
 #include <linux/list.h>

net/batman-adv/netlink.c

@@ -7,6 +7,7 @@
 #include "netlink.h"
 #include "main.h"
 
+#include <linux/array_size.h>
 #include <linux/atomic.h>
 #include <linux/bitops.h>
 #include <linux/bug.h>
@@ -20,7 +21,6 @@
 #include <linux/if_ether.h>
 #include <linux/if_vlan.h>
 #include <linux/init.h>
-#include <linux/kernel.h>
 #include <linux/limits.h>
 #include <linux/list.h>
 #include <linux/minmax.h>