bonding: Prevent initial bond0 creation

By default bond0 will be created when the bonding module is laoded.
To prevent this max_bonds can be set to 0 to prevent the creation of any
bonds whenm loading the module.

Change-Id: Ic7fb7848e9f2ff00c236a29e2a0b399b49397919
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=989419
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>