tcp: reclaim 8 bytes in struct request_sock_queue

synflood_warned had to be u32 for xchg(), but ensuring
atomicity is not really needed.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250919204856.2977245-9-edumazet@google.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>