app/testpmd: expand RED queue thresholds to 64 bits

app/testpmd: expand RED queue thresholds to 64 bits

There's very commonly that more than 4G DDR memory in NIC for HQoS,
so right now the queue threshold size of RED needs to expand to
uint64_t. For struct rte_tm_red_params, it has been fixed, but for
test-pmd TM configuration, it hasn't been fixed. This patch fixes it.

Fixes: bddc2f40b594 ("app/testpmd: add commands for shaper and wred profiles")
Cc: stable@dpdk.org
Signed-off-by: Rosen Xu <rosen.xu@intel.com>
Reviewed-by: Jasvinder Singh <jasvinder.singh@intel.com>