[NETFILTER]: Put arpt_mutex back into arp_tables.c

include/linux/netfilter_arp.h

@@ -17,5 +17,4 @@
 #define NF_ARP_FORWARD	2
 #define NF_ARP_NUMHOOKS	3
 
-static DECLARE_MUTEX(arpt_mutex);
 #endif /* __LINUX_ARP_NETFILTER_H */

net/ipv4/netfilter/arp_tables.c

@@ -62,6 +62,8 @@ do {								\
 #include <linux/netfilter_ipv4/lockhelp.h>
 #include <linux/netfilter_ipv4/listhelp.h>
 
+static DECLARE_MUTEX(arpt_mutex);
+
 struct arpt_table_info {
 	unsigned int size;
 	unsigned int number;