bond: Give bridge control over LACP module.

bond: Give bridge control over LACP module.

Before this patch, the bonding code had taken over responsibility
for running the LACP module.  However, the bonding code only needs
the LACP module for some basic status queries.  LACP and bonding
are actually logically parallel modules and do not really have a
parent child relationship.  Furthermore, we need to be able to run
LACP on non-bonded interfaces which the existing approach
prevented.  This patch gives control of the LACP module back to the
bridge.