RDMA/netlink: Add nldev initialization flows

Add nldev init and exit flows to the RDMA/core.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 5272c38..66b109b 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -1212,6 +1212,7 @@ static int __init ib_core_init(void)
 		goto err_sa;
 	}
 
+	nldev_init();
 	rdma_nl_register(RDMA_NL_LS, ibnl_ls_cb_table);
 	ib_cache_setup();
 
@@ -1237,6 +1238,7 @@ static int __init ib_core_init(void)
 static void __exit ib_core_cleanup(void)
 {
 	ib_cache_cleanup();
+	nldev_exit();
 	rdma_nl_unregister(RDMA_NL_LS);
 	unregister_lsm_notifier(&ibdev_lsm_nb);
 	ib_sa_cleanup();