ionic: reduce the use of netdev

To help make sure we're only accessing things we really need
to access we can cut down on the q->lif->netdev references by
using q->dev which is already in cache.

Reviewed-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>