vty: Register logging_set_log_level_cmd

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/openbsc/src/vty_interface.c b/openbsc/src/vty_interface.c
index 22284d8..f510f0e 100644
--- a/openbsc/src/vty_interface.c
+++ b/openbsc/src/vty_interface.c
@@ -1797,6 +1797,7 @@
 	install_element(VIEW_NODE, &logging_prnt_timestamp_cmd);
 	install_element(VIEW_NODE, &logging_set_category_mask_cmd);
 	install_element(VIEW_NODE, &logging_level_cmd);
+	install_element(VIEW_NODE, &logging_set_log_level_cmd);
 
 	install_element(CONFIG_NODE, &cfg_net_cmd);
 	install_node(&net_node, config_write_net);