libcamera: camera: Hide Camera::create() from the public API

The Camera::create() function is internal. Hide it from the public API
documentation.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>

src/libcamera/camera.cpp

@@ -821,6 +821,7 @@ void Camera::Private::setState(State state)
  */
 
 /**
+ * \internal
  * \brief Create a camera instance
  * \param[in] d Camera private data
  * \param[in] id The ID of the camera device