net/sched: act_api: don't open code max()

Use max() in a couple of places that are open coding it with the
ternary operator.

Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20231208192847.714940-5-pctammela@mojatatu.com


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