Use new rte_eth_linkstatus_get/set helper functions to handle link
status update.
And cleanup the logic in the the link update routine.
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Tested-by: Shijith Thotton <shijith.thotton@caviumnetworks.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>