[media] mc-core.rst: fix a warning about an internal routine

Fix this warning:
	Documentation/media/kapi/mc-core.rst:97: WARNING: c:func reference target not found: media_devnode_release

The media_device_release() is a function internal to media-devnode.c,
and not exported elsewhere. So, we can't cross-reference it here.
Make it explicit at the documentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/include/media/media-devnode.h b/include/media/media-devnode.h
index 972168e90413..cd23e915764c 100644
--- a/include/media/media-devnode.h
+++ b/include/media/media-devnode.h
@@ -76,7 +76,8 @@ struct media_file_operations {
  * @parent:     parent device
  * @minor:      device node minor number
  * @flags:      flags, combination of the ``MEDIA_FLAG_*`` constants
- * @release:    release callback called at the end of media_devnode_release()
+ * @release:    release callback called at the end of ``media_devnode_release()``
+ *              routine at media-device.c.
  *
  * This structure represents a media-related device node.
  *