Currently macsec offload will be enabled every time when device starts.
It will cause QoS sample application performance drop issue. This patch
adds check in dev_start ops to make sure macsec is only enabled when
required explicitly.
Fixes: 50556c88104c ("net/ixgbe: fix MACsec setting") Cc: stable@dpdk.org Signed-off-by: Shougang Wang <shougangx.wang@intel.com> Reviewed-by: Xiaolong Ye <xiaolong.ye@intel.com>