bonding: copy entire config structure in mode 4

bonding: copy entire config structure in mode 4

Copy all needed fields from the mode8023ad_private structure in
bond_mode_8023ad_conf_get().  This help ensure that a subsequent call
to rte_eth_bond_8023ad_setup() is not passed uninitialized data that
would result in either incorrect behavior or a failed sanity check.

Fixes: 46fb43683679 ("bond: add mode 4")

Signed-off-by: Eric Kinzie <ekinzie@brocade.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Declan Doherty <declan.doherty@intel.com>