This reverts commit
cdc85c875b842b9309f72caefc51c262f521cf92.
There appears to be a kernel bug that (among other things) cause bridges
not to get a bridge id set when supplying IFLA_ADDRESS when creating the
netdev.
Simply revert the whole thing until we sort this out in the kernel.
See: http://www.spinics.net/lists/netdev/msg279807.html
Reported-by: C. R. Oldham <cr@saltstack.com>