Use rte_pktmbuf_free_bulk to release all mbufs at once. This is flagged
as obsolete/not yet stable in DPDK but seems to be functional.
Don't count the released frames, it's no longer needed in the caller.
Signed-off-by: Alex Marginean <alexandru.marginean@nxp.com> Acked-by: Gagandeep Singh <g.singh@nxp.com>