net/sched: sch_cake: annotate data-races in cake_dump_stats() (II)

net/sched: sch_cake: annotate data-races in cake_dump_stats() (II)

cake_dump_stats() runs without qdisc spinlock being held.

In this second patch, I add READ_ONCE()/WRITE_ONCE() annotations
for the following fields:

- bulk_flow_count
- unresponsive_flow_count
- max_skblen
- flow_quantum

Other annotations are added in following patches, to ease code review.

Fixes: 046f6fd5daef ("sched: Add Common Applications Kept Enhanced (cake) qdisc")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: "Toke Høiland-Jørgensen" <toke@toke.dk>
Link: https://patch.msgid.link/20260427083606.459355-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>