use new netlink events helpers tcmu_netlink_init() and
tcmu_netlink_send() to refactor netlink event TCMU_CMD_ADDED_DEVICE
Signed-off-by: NZhu Lingshan <lszhu@suse.com>
Acked-by: NMike Christie <mchristi@redhat.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>