After the meter policies are created, they are not freed on device
close.
This patch fixes it.
Fixes: 5f0d54f372f0 ("ethdev: add pre-defined meter policy API")
Cc: stable@dpdk.org
Signed-off-by: Dapeng Yu <dapengx.yu@intel.com>
Acked-by: Jasvinder Singh <jasvinder.singh@intel.com>