nl_bond: properly propagate per vlan stp states on attachment
nl_bond: properly propagate per vlan stp states on attachment

Properly apply configured per-vlan stp state of the bond to new members,
and remove it from leaving members.

Signed-off-by: Jonas Gorski <9712c064bde5a52658fc87d6454b4956f9bf286b@bisdn.de>

bisdn/basebox,bisdn/basebox,bisdn/basebox,bisdn/basebox