According to the standard, state machine of LACP should transmit lacpdu
when partner's state changes from slow to fast, rather than from fast
to slow.
Fixes: 46fb43683679 ("bond: add mode 4")
Cc: stable@dpdk.org
Signed-off-by: Sha Zhang <zhangsha.zhang@huawei.com>
Acked-by: Declan Doherty <declan.doherty@intel.com>