Until now when a querier was present static entries couldn't be deleted.
Fix this and allow the user to manipulate the mdb with or without a
querier.
Signed-off-by: NSatish Ashok <sashok@cumulusnetworks.com>
Signed-off-by: NNikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>