If the PF driver supports the new speed reporting capabilities
then use link_event_adv instead of link_event to get the speed.
Fixes: 2a73125b7041 ("i40evf: fix link info update")
Cc: stable@dpdk.org
Signed-off-by: Guinan Sun <guinanx.sun@intel.com>
Acked-by: Jeff Guo <jia.guo@intel.com>
Tested-by: Jiaqi Min <jiaqix.min@intel.com>