navigator: parameter cleanup

src/modules/navigator/rtl_params.c

@@ -47,6 +47,17 @@
  * RTL parameters, accessible via MAVLink
  */
 
+/**
+ * Loiter radius after RTL (FW only)
+ *
+ * Default value of loiter radius after RTL (fixedwing only).
+ *
+ * @unit meters
+ * @min 0.0
+ * @group RTL
+ */
+PARAM_DEFINE_FLOAT(RTL_LOITER_RAD, 50.0f);
+
 /**
  * RTL altitude
  *