app/testpmd: limit number of forwarding cores
app/testpmd: limit number of forwarding cores

Number of forwarding cores must be equal or less than
number of forwarding streams, otherwise two cores
would try to use a same queue on a port, which is not allowed.

Fixes: f2bb7ae1d204 ("app/testpmd: handle all Rx queues in RSS setup")

Signed-off-by: Pablo de Lara <28355d9cfe41bb8148aea0fb24f47aae8f4217a1@intel.com>
Tested-by: Nelio Laranjeiro <2f8dd9032d5b85ca4b53dec8ce664eb6998836be@6wind.com>
Acked-by: John McNamara <af31595c36a4239b9676e9b3a777d3e2f15a6c4d@intel.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk