app/testpmd: fix metering and policing commands

app/testpmd: fix metering and policing commands

Fixes bad arguments error for cli commands related to adding meter
profile for srtcm_rfc2697, trtcm_rfc2698 and trtcm_rfc4115.

error log:
testpmd> add port meter profile trtcm_rfc2698 2 0 3125000000
3125000000 2500000 2500000
Bad arguments

Fixes: 30ffb4e67ee3 ("app/testpmd: add commands traffic metering and policing")
Cc: stable@dpdk.org
Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com>
Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>