fix(ip): Complete addrlabel add/del properties

Author: yedayak

completions/ip

@@ -203,8 +203,10 @@ _comp_cmd_ip()
                 add | del)
                     if [[ $prev == dev ]]; then
                         _comp_compgen_available_interfaces
+                    elif [[ $prev == prefix || $prev == label ]]; then
+                        : # TODO - Is there a way to complete these?
                     else
-                        : # TODO
+                        _comp_compgen -- -W 'dev prefix label'
                     fi
                     ;;
                 list | flush | help) ;;