batman-adv: Drop prandom.h includes

The commit 8032bf12 ("treewide: use get_random_u32_below() instead of
deprecated function") replaced the prandom.h function prandom_u32_max with
the random.h function get_random_u32_below. There is no need to still
include prandom.h.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>

net/batman-adv/bat_iv_ogm.c

@@ -27,7 +27,6 @@
 #include <linux/netdevice.h>
 #include <linux/netlink.h>
 #include <linux/pkt_sched.h>
-#include <linux/prandom.h>
 #include <linux/printk.h>
 #include <linux/random.h>
 #include <linux/rculist.h>

net/batman-adv/bat_v_elp.c

@@ -21,7 +21,6 @@
 #include <linux/minmax.h>
 #include <linux/netdevice.h>
 #include <linux/nl80211.h>
-#include <linux/prandom.h>
 #include <linux/random.h>
 #include <linux/rculist.h>
 #include <linux/rcupdate.h>

net/batman-adv/bat_v_ogm.c

@@ -21,7 +21,6 @@
 #include <linux/minmax.h>
 #include <linux/mutex.h>
 #include <linux/netdevice.h>
-#include <linux/prandom.h>
 #include <linux/random.h>
 #include <linux/rculist.h>
 #include <linux/rcupdate.h>

net/batman-adv/network-coding.c

@@ -25,8 +25,8 @@
 #include <linux/lockdep.h>
 #include <linux/net.h>
 #include <linux/netdevice.h>
-#include <linux/prandom.h>
 #include <linux/printk.h>
+#include <linux/random.h>
 #include <linux/rculist.h>
 #include <linux/rcupdate.h>
 #include <linux/skbuff.h>