ionic: update the queue count on open

Let the network stack know the real number of queues that
we are using.

v2: added error checking

Fixes: 49d3b493

 ("ionic: disable the queues on link down")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>