[NETLINK]: Reserve a slot for NETLINK_GENERIC.

As requested by Jamal.
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netlink.h

@@ -20,6 +20,7 @@
 #define NETLINK_IP6_FW		13
 #define NETLINK_DNRTMSG		14	/* DECnet routing messages */
 #define NETLINK_KOBJECT_UEVENT	15	/* Kernel messages to userspace */
+#define NETLINK_GENERIC		16
 
 #define MAX_LINKS 32