tcp: small optimization when TCP_TW_SYN is processed

tcp: small optimization when TCP_TW_SYN is processed

When TCP_TW_SYN is processed, we perform a lookup to find
a listener and jump back in tcp_v6_rcv() and tcp_v4_rcv()

Paolo suggested that we do not have to check if the
found socket is a TIME_WAIT or NEW_SYN_RECV one.

Suggested-by: Paolo Abeni <pabeni@redhat.com>
Link: https://lore.kernel.org/netdev/68085c8a84538cacaac991415e4ccc72f45e76c2.camel@redhat.com/
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Link: https://lore.kernel.org/r/20240411082530.907113-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>