app/testpmd: configure RSS without restart
app/testpmd: configure RSS without restart

The function cmd_config_rss_parsed() associated with the command
"port config rss all" required to first stop all ports, in order to
then entirely re-configure all ports with the new RSS hash computation
parameters.
Use now the new function rte_eth_dev_rss_hash_conf_update() that dynamically
only changes the RSS hash computation parameters of a port, without needing
to previously stop the port.

Signed-off-by: Ivan Boule <8408c61bea57ac94dd0d4dac44b115be1b288952@6wind.com>
Acked-by: Thomas Monjalon <ee2fa8b2681c737f775687e475dcbf2028a412f1@6wind.com>

mixja/dpdk,mixja/dpdk,venkynv/dpdk-mirror,tsphillips/dpdk-fork,tsphillips/dpdk-fork,venkynv/dpdk-mirror,msune/dpdk,tsphillips/dpdk-fork,tsphillips/dpdk-fork,john-mcnamara-intel/dpdk,msune/dpdk,venkynv/dpdk-mirror,john-mcnamara-intel/dpdk,msune/dpdk,venkynv/dpdk-mirror,msune/dpdk,mixja/dpdk,mixja/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk