libcamera: Place doxygen \file block above namespace

Make the whole code base consistent by placing the doxygen \file block
above the libcamera namespace opening. There's a single offender, and
two locations in which a white line is missing.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Umang Jain <email@uajain.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/byte_stream_buffer.cpp

@@ -12,15 +12,15 @@
 
 #include "libcamera/internal/log.h"
 
-namespace libcamera {
-
-LOG_DEFINE_CATEGORY(Serialization)
-
 /**
  * \file byte_stream_buffer.h
  * \brief Managed memory container for serialized data
  */
 
+namespace libcamera {
+
+LOG_DEFINE_CATEGORY(Serialization)
+
 /**
  * \class ByteStreamBuffer
  * \brief Wrap a memory buffer and provide sequential data read and write

src/libcamera/v4l2_pixelformat.cpp

@@ -22,6 +22,7 @@
  * \file v4l2_pixelformat.h
  * \brief V4L2 Pixel Format
  */
+
 namespace libcamera {
 
 LOG_DECLARE_CATEGORY(V4L2)

src/libcamera/v4l2_videodevice.cpp

@@ -32,6 +32,7 @@
  * \file v4l2_videodevice.h
  * \brief V4L2 Video Device
  */
+
 namespace libcamera {
 
 LOG_DECLARE_CATEGORY(V4L2)