bpf: Use sockfd_put() helper

Replace fput() with sockfd_put() in bpf_fd_reuseport_array_update_elem().
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Acked-by: Stanislav Fomichev <sdf@fomichev.me>
Link: https://lore.kernel.org/r/20240830020756.607877-1-ruanjinjie@huawei.comSigned-off-by: Alexei Starovoitov <ast@kernel.org>

kernel/bpf/reuseport_array.c

@@ -308,7 +308,7 @@ int bpf_fd_reuseport_array_update_elem(struct bpf_map *map, void *key,
 
 	spin_unlock_bh(&reuseport_lock);
 put_file:
-	fput(socket->file);
+	sockfd_put(socket);
 	return err;
 }