clang-tidy: partially fix hicpp-use-override

src/lib/cdev/test/cdevtest_example.cpp

@@ -106,12 +106,12 @@ public:
 		_is_open_for_write(false),
 		_write_offset(0) {}
 
-	~CDevNode() = default;
+	~CDevNode() override = default;
 
-	virtual int open(cdev::file_t *handlep);
-	virtual int close(cdev::file_t *handlep);
-	virtual ssize_t write(cdev::file_t *handlep, const char *buffer, size_t buflen);
-	virtual ssize_t read(cdev::file_t *handlep, char *buffer, size_t buflen);
+	int open(cdev::file_t *handlep) override;
+	int close(cdev::file_t *handlep) override;
+	ssize_t write(cdev::file_t *handlep, const char *buffer, size_t buflen) override;
+	ssize_t read(cdev::file_t *handlep, char *buffer, size_t buflen) override;
 private:
 	bool _is_open_for_write;
 	size_t _write_offset;

src/lib/drivers/led/led.cpp

@@ -60,10 +60,10 @@ class LED : cdev::CDev
 {
 public:
 	LED();
-	virtual ~LED() = default;
+	~LED() override = default;
 
-	virtual int		init();
-	virtual int		ioctl(cdev::file_t *filp, int cmd, unsigned long arg);
+	int	init() override;
+	int	ioctl(cdev::file_t *filp, int cmd, unsigned long arg) override;
 };
 
 LED::LED() : CDev(LED0_DEVICE_PATH)

src/lib/rc/rc_tests/RCTest.cpp

@@ -26,7 +26,7 @@ extern "C" __EXPORT int rc_tests_main(int argc, char *argv[]);
 class RCTest : public UnitTest
 {
 public:
-	virtual bool run_tests();
+	bool run_tests() override;
 
 private:
 	bool crsfTest();