AP_Notify: rgbled methods protected and add override

no functional change

libraries/AP_Notify/DiscoLED.h

@@ -28,8 +28,11 @@ class DiscoLED: public RGBLed
 {
 public:
     DiscoLED();
-    bool hw_init(void);
-    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b);
+
+protected:
+    bool hw_init(void) override;
+    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b) override;
+
 private:
     Linux::PWM_Sysfs_Bebop red_pwm;
     Linux::PWM_Sysfs_Bebop green_pwm;

libraries/AP_Notify/DiscreteRGBLed.h

@@ -24,8 +24,10 @@ class DiscreteRGBLed: public RGBLed {
 public:
     DiscreteRGBLed(uint16_t red, uint16_t green, uint16_t blue, bool polarity);
 
+protected:
     bool hw_init(void) override;
     bool hw_set_rgb(uint8_t red, uint8_t green, uint8_t blue) override;
+
 private:
     AP_HAL::DigitalSource *red_pin;
     AP_HAL::DigitalSource *green_pin;

libraries/AP_Notify/NavioLED_I2C.h

@@ -22,8 +22,8 @@
 class NavioLED_I2C : public NavioLED
 {
 protected:
-    virtual bool hw_init(void);
-    virtual bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b);
+    bool hw_init(void) override;
+    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b) override;
 
 private:
     AP_HAL::OwnPtr<AP_HAL::I2CDevice> _dev;

libraries/AP_Notify/RCOutputRGBLed.h

@@ -9,8 +9,10 @@ public:
                    uint8_t led_medium, uint8_t led_dim);
     RCOutputRGBLed(uint8_t red_channel, uint8_t green_channel,
                    uint8_t blue_channel);
-    bool hw_init();
-    virtual bool hw_set_rgb(uint8_t red, uint8_t green, uint8_t blue);
+
+protected:
+    bool hw_init() override;
+    virtual bool hw_set_rgb(uint8_t red, uint8_t green, uint8_t blue) override;
 
 private:
     uint8_t _red_channel;

libraries/AP_Notify/ToshibaLED_I2C.h

@@ -21,9 +21,9 @@
 
 class ToshibaLED_I2C : public ToshibaLED
 {
-public:
-    bool hw_init(void);
-    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b);
+protected:
+    bool hw_init(void) override;
+    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b) override;
 
 private:
     AP_HAL::OwnPtr<AP_HAL::I2CDevice> _dev;

libraries/AP_Notify/ToshibaLED_PX4.h

@@ -24,9 +24,9 @@
 
 class ToshibaLED_PX4 : public ToshibaLED
 {
-public:
-    bool hw_init(void);
-    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b);
+protected:
+    bool hw_init(void) override;
+    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b) override;
 private:
     int _rgbled_fd;
     void update_timer(void);

libraries/AP_Notify/VRBoard_LED.h

@@ -27,6 +27,7 @@ class VRBoard_LED: public RGBLed {
 public:
 	VRBoard_LED();
 
-    bool hw_init(void);
-    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b);
+protected:
+    bool hw_init(void) override;
+    bool hw_set_rgb(uint8_t r, uint8_t g, uint8_t b) override;
 };