[ffulm] downgrade batman - the new version does not work yet

Revert "batman-adv: upgrade package to latest release 2013.0.0 & netifd integration"

This reverts commit b6f4a5c8c0b061ff3b7db7a4c0f873670502bb75.

Conflicts:

	net/batman-adv/files/etc/config/batman-adv