net: mpls: Delete route when all nexthops have been deleted
When all devices for all nexthops in a route have been deleted, the route is effectively dead, so remove it. Signed-off-by: NDavid Ahern <dsa@cumulusnetworks.com> Acked-by: NRoopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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