[dts] [PATCH v2] tests/hotplug: fix some failure cases

[Liu, Yong]

Thanks Phil, applied in.

On 10/18/2017 04:41 PM, Phil Yang wrote:
> 1. Updated testpmd path for multiarch.
> 2. Fix port binding timeout in tear-down process.
> 3. Add vfio-pci and vfio-pci:noiommu support.
> 3. Clear packets stats before packet send to avoid test errors caused by
> broadcast packets.
>
> Signed-off-by: Phil Yang<phil.yang at arm.com>