This reverts commit 702211ac.

And refreshes the according patches to OpenWrt 24.10 / batman-adv
v2024.3.

Patch needs a rebase. Remove in the meantime.

Signed-off-by: David Bauer <mail@david-bauer.net>

This mark prevents a multicast packet being flooded through the whole
mesh. The advantage of marking certain multicast packets via e.g.
ebtables instead of dropping is then the following:

This allows an administrator to let specific multicast packets pass as
long as they are forwarded to a limited number of nodes only and are
therefore creating no burdon to unrelated nodes.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>