[DECNET] ROUTE: remove unecessary alignment

Same alignment requirement was removed on IP route cache in the past.

This alignment actually has bad effect on 32 bit arches, uniprocessor,
since sizeof(dn_rt_hash_bucket) is forced to 8 bytes instead of 4.
Signed-off-by: NEric Dumazet <dada1@cosmosbay.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/decnet/dn_route.c

@@ -94,7 +94,7 @@ struct dn_rt_hash_bucket
 {
 	struct dn_route *chain;
 	spinlock_t lock;
-} __attribute__((__aligned__(8)));
+};
 
 extern struct neigh_table dn_neigh_table;