doc: replace @return by Return:

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/drivers/video/video_bmp.c b/drivers/video/video_bmp.c
index e8600b2..c8c3fd3 100644
--- a/drivers/video/video_bmp.c
+++ b/drivers/video/video_bmp.c
@@ -21,7 +21,7 @@
 /**
  * get_bmp_col_16bpp() - Convert a colour-table entry into a 16bpp pixel value
  *
- * @return value to write to the 16bpp frame buffer for this palette entry
+ * Return: value to write to the 16bpp frame buffer for this palette entry
  */
 static uint get_bmp_col_16bpp(struct bmp_color_table_entry cte)
 {