It's a normal behavior to change the link status to up after
resetting the port. So it is unnecessary to set link down before
starting port, and changing the link state(link up/down) frequently
will cause link speed unstable.
Fixes: c3f2fbff78cf ("net/ixgbe: fix link status")
Cc: stable@dpdk.org
Signed-off-by: Shougang Wang <shougangx.wang@intel.com>
Acked-by: Qiming Yang <qiming.yang@intel.com>
Tested-by: Xueming Zhang <xuemingx.zhang@intel.com>