tcp: Remove hashinfo test for inet6?_lookup_run_sk_lookup().

Commit 6c886db2e78c ("net: remove duplicate sk_lookup helpers")
started to check if hashinfo == net->ipv4.tcp_death_row.hashinfo
in __inet_lookup_listener() and inet6_lookup_listener() and
stopped invoking BPF sk_lookup prog for DCCP.

DCCP has gone and the condition is always true.

Let's remove the hashinfo test.

Signed-off-by: Kuniyuki Iwashima <[e-mail]>
Reviewed-by: Eric Dumazet <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

net/ipv4/inet_hashtables.c

···
 	unsigned int hash2;
 
 	/* Lookup redirect from BPF */
-	if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
-	    hashinfo == net->ipv4.tcp_death_row.hashinfo) {
+	if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
 		result = inet_lookup_run_sk_lookup(net, IPPROTO_TCP, skb, doff,
 						   saddr, sport, daddr, hnum, dif,
 						   inet_ehashfn);

net/ipv6/inet6_hashtables.c

···
 	unsigned int hash2;
 
 	/* Lookup redirect from BPF */
-	if (static_branch_unlikely(&bpf_sk_lookup_enabled) &&
-	    hashinfo == net->ipv4.tcp_death_row.hashinfo) {
+	if (static_branch_unlikely(&bpf_sk_lookup_enabled)) {
 		result = inet6_lookup_run_sk_lookup(net, IPPROTO_TCP, skb, doff,
 						    saddr, sport, daddr, hnum, dif,
 						    inet6_ehashfn);