Merge branch 'net-sched-act_api-contiguous-action-arrays'

Pedro Tammela says:

====================
net/sched: act_api: contiguous action arrays

When dealing with action arrays in act_api it's natural to ask if they
are always contiguous (no NULL pointers in between). Yes, they are in
all cases so far, so make use of the already present tcf_act_for_each_action
macro to explicitly document this assumption.

There was an instance where it was not, but it was refactorable (patch 2)
to make the array contiguous.

v1->v2:
- Respin
- Added Jamal's acked-by
====================

Link: https://lore.kernel.org/r/20231201175015.214214-1-pctammela@mojatatu.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>