app/testpmd: fix bonding slave devices not released

app/testpmd: fix bonding slave devices not released

Currently, some eth devices are added to bond device, these devices are
not released when the quit command is executed in testpmd. This patch
adds the release operation for all active slaves under a bond device.

Fixes: 0e545d3047fe ("app/testpmd: check stopping port is not in bonding")
Cc: stable@dpdk.org
Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
Acked-by: Ferruh Yigit <ferruh.yigit@xilinx.com>