datapath: backport: ovs/geneve: fix rtnl notifications on iface deletion

datapath: backport: ovs/geneve: fix rtnl notifications on iface deletion

Upstream Commit:
    commit 41009481b690493c169ce85f591b9d32c6fd9422
    Author: Nicolas Dichtel <nicolas.dichtel@6wind.com>

    ovs/geneve: fix rtnl notifications on iface deletion

    The function geneve_dev_create_fb() (only used by ovs) never calls
    rtnl_configure_link(). The consequence is that dev->rtnl_link_state is
    never set to RTNL_LINK_INITIALIZED.
    During the deletion phase, the function rollback_registered_many() sends
    a RTM_DELLINK only if dev->rtnl_link_state is set to RTNL_LINK_INITIALIZED.

    Fixes: e305ac6cf5a1 ("geneve: Add support to collect tunnel metadata.")
    CC: Pravin B Shelar <pshelar@ovn.org>
    CC: Jesse Gross <jesse@ovn.org>
    CC: Thomas Graf <tgraf@suug.ch>
    Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Pravin B Shelar <pshelar@ovn.org>
Acked-by: Jesse Gross <jesse@kernel.org>