net/sched: sch_cbq: change the type of cbq_set_lss to void

Change the type of cbq_set_lss to void.

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Link: https://lore.kernel.org/r/20220726030748.243505-1-shaozhengchao@huawei.com


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