netfilter: nf_flow_table: make flow_offload_dead inline

It is too trivial to keep as a separate exported function
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

include/net/netfilter/nf_flow_table.h

@@ -103,7 +103,10 @@ void nf_flow_table_cleanup(struct net *net, struct net_device *dev);
 int nf_flow_table_init(struct nf_flowtable *flow_table);
 void nf_flow_table_free(struct nf_flowtable *flow_table);
 
-void flow_offload_dead(struct flow_offload *flow);
+static inline void flow_offload_dead(struct flow_offload *flow)
+{
+	flow->flags |= FLOW_OFFLOAD_DYING;
+}
 
 int nf_flow_snat_port(const struct flow_offload *flow,
 		      struct sk_buff *skb, unsigned int thoff,

net/netfilter/nf_flow_table_core.c

@@ -113,12 +113,6 @@ void flow_offload_free(struct flow_offload *flow)
 }
 EXPORT_SYMBOL_GPL(flow_offload_free);
 
-void flow_offload_dead(struct flow_offload *flow)
-{
-	flow->flags |= FLOW_OFFLOAD_DYING;
-}
-EXPORT_SYMBOL_GPL(flow_offload_dead);
-
 static u32 flow_offload_hash(const void *data, u32 len, u32 seed)
 {
 	const struct flow_offload_tuple *tuple = data;