net/ixgbe: fix busy wait during checking link status

net/ixgbe: fix busy wait during checking link status

If we haven't set wait_to_complete, there is no need to busy wait
until we have a link status.  Applications, like bonding, use the
wait_to_complete flag to indicate that they will be doing their own
busy wait and will likely be polling again shortly.

Fixes: dc66e5fd01b9 ("net/ixgbe: improve link state check on VF")
Cc: stable@dpdk.org
Signed-off-by: Chas Williams <chas3@att.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>