netfilter: nf_flow_table: remove union from flow_offload structure

Drivers do not have access to the flow_offload structure, hence remove
this union from this flow_offload object as well as the original comment
on top of it.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/netfilter/nf_flow_table.h

@@ -74,10 +74,7 @@ struct flow_offload {
 	struct flow_offload_tuple_rhash		tuplehash[FLOW_OFFLOAD_DIR_MAX];
 	struct nf_conn				*ct;
 	u32					flags;
-	union {
-		/* Your private driver data here. */
 	u32					timeout;
-	};
 };
 
 #define NF_FLOW_TIMEOUT (30 * HZ)