bridge/mdb: remove wrong use of NLM_F_MULTI
bridge/mdb: remove wrong use of NLM_F_MULTI

NLM_F_MULTI must be used only when a NLMSG_DONE message is sent. In fact,
it is sent only at the end of a dump.

Libraries like libnl will wait forever for NLMSG_DONE.

Fixes: 37a393bc4932 ("bridge: notify mdb changes via netlink")
CC: Cong Wang <b08afa93ec8eabe95bc97d12956ca699fa65834c@redhat.com>
CC: Stephen Hemminger <06fa905d7f2aaced6dc72e9511c71a2a51e8aead@networkplumber.org>
CC: 2fa1981b4a9a7a3e2f1294354810635b9030c74f@lists.linux-foundation.org
Signed-off-by: Nicolas Dichtel <7864bb1e0e12322ea18ea731d051b95b75140567@6wind.com>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs