datapath: Account for "genetlink: pass only network namespace to genl_has_listeners()"

datapath: Account for "genetlink: pass only network namespace to genl_has_listeners()"

Upstream commit:
    genetlink: pass only network namespace to genl_has_listeners()

    There's no point to force the caller to know about the internal
    genl_sock to use inside struct net, just have them pass the network
    namespace. This doesn't really change code generation since it's
    an inline, but makes the caller less magic - there's never any
    reason to pass another socket.

    Signed-off-by: Johannes Berg <johannes.berg@intel.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
Upstream: f8403a2 ("genetlink: pass only network namespace to genl_has_listeners()")
Signed-off-by: Thomas Graf <tgraf@noironetworks.com>
Acked-by: Pravin B Shelar <pshelar@nicira.com>