libcamera: Mark logPrefix() implementations with override

Virtual functions overriden in derived classes should be marked with the
override keyword. Do so for the logPrefix() implementations inheriting
from the Loggable class.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

include/libcamera/internal/camera_sensor.h

@@ -66,7 +66,7 @@ public:
 	int sensorInfo(CameraSensorInfo *info) const;
 
 protected:
-	std::string logPrefix() const;
+	std::string logPrefix() const override;
 
 private:
 	const MediaEntity *entity_;