[DECNET]: Convert decnet route to use the new dst_entry 'next' pointer

This patch removes the next pointer from 'struct dn_route.u' union,
and renames u.rt_next to u.dst.dn_next.

It also moves 'struct flowi' right after 'struct dst_entry' to prepare
speedup lookups.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/dn_route.h b/include/net/dn_route.h
index 76f957e..a566944 100644
--- a/include/net/dn_route.h
+++ b/include/net/dn_route.h
@@ -68,9 +68,10 @@
 struct dn_route {
 	union {
 		struct dst_entry dst;
-		struct dn_route *rt_next;
 	} u;
 
+	struct flowi fl;
+
 	__le16 rt_saddr;
 	__le16 rt_daddr;
 	__le16 rt_gateway;
@@ -80,8 +81,6 @@
 
 	unsigned rt_flags;
 	unsigned rt_type;
-
-	struct flowi fl;
 };
 
 extern void dn_route_init(void);