If the bond device was created by vdev mode, the kvlist was not free
after the bond device was closed.
This patch fixes it.
Fixes: 144dc4739975 ("net/bonding: fix leak on remove")
Cc: stable@dpdk.org
Signed-off-by: Dapeng Yu <dapengx.yu@intel.com>
Acked-by: Min Hu (Connor) <humin29@huawei.com>