libcamera: Make all internal headers visible to Doxygen

Two classes that have both public and internal headers, namely Camera
and Request, make only their public header visible to Doxygen through a
file directive. Fix them.

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

src/libcamera/camera.cpp

@@ -117,6 +117,11 @@
  * of view is affected by the pipeline.
  */
 
+/**
+ * \file libcamera/internal/camera.h
+ * \brief Internal camera device handling
+ */
+
 namespace libcamera {
 
 LOG_DECLARE_CATEGORY(Camera)

src/libcamera/request.cpp

@@ -28,6 +28,11 @@
  * \brief Describes a frame capture request to be processed by a camera
  */
 
+/**
+ * \file libcamera/internal/request.h
+ * \brief Internal support for request handling
+ */
+
 namespace libcamera {
 
 LOG_DEFINE_CATEGORY(Request)