For VF events indicating a change in the state of the switch manager,
the driver will restore the basic port configurations and then pass this
event to application so that the application can restore any additional
configurations if required.
In this way, once the switch manager restarts, the DPDK application can
resume its network.
Signed-off-by: Xiao Wang <xiao.w.wang@intel.com> Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>