Setting exact link speed makes sense if auto-negotiation is
disabled. Fixed flag is required to disable auto-negotiation.
Fixes: 88fbedcd5e5a ("app/testpmd: move speed and duplex parsing in a function")
Cc: stable@dpdk.org
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>