tipc: move netlink policies to netlink.c

Make the c files less cluttered and enable netlink attributes to be
shared between files.

Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Acked-by: Parthasarathy Bhuvaragan <parthasarathy.bhuvaragan@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/net.c b/net/tipc/net.c
index 86d68b3..28bf4fe 100644
--- a/net/tipc/net.c
+++ b/net/tipc/net.c
@@ -41,11 +41,7 @@
 #include "socket.h"
 #include "node.h"
 #include "bcast.h"
-
-static const struct nla_policy tipc_nl_net_policy[TIPC_NLA_NET_MAX + 1] = {
-	[TIPC_NLA_NET_UNSPEC]	= { .type = NLA_UNSPEC },
-	[TIPC_NLA_NET_ID]	= { .type = NLA_U32 }
-};
+#include "netlink.h"
 
 /*
  * The TIPC locking policy is designed to ensure a very fine locking