AttPosEKF: Compile fix for protected HIL function

src/modules/ekf_att_pos_estimator/estimator_22states.h

@@ -380,6 +380,12 @@ public:
     **/
     void setIsFixedWing(const bool fixedWing);
     
+    /**
+     * @brief
+     *   Reset internal filter states and clear all variables to zero value
+     */
+    void ZeroVariables();
+
 protected:
 
     /**
@@ -408,12 +414,6 @@ protected:
 
     void ResetStoredStates();
 
-    /**
-     * @brief
-     *   Reset internal filter states and clear all variables to zero value
-     */
-    void ZeroVariables();
-
 private:
     bool _isFixedWing;               ///< True if the vehicle is a fixed-wing frame type
     bool _onGround;                  ///< boolean true when the flight vehicle is on the ground (not flying)