doc-rst: linux_tv: Replace reference names to match ioctls

Due to a limitation at the DocBook language, the references
were using lowercase and slashes, instead of the name of the
ioctls. On ReST, make them identical. This will hopefully
help to cleanup the code a little bit.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/Documentation/linux_tv/media/v4l/vidioc-g-dv-timings.rst b/Documentation/linux_tv/media/v4l/vidioc-g-dv-timings.rst
index 19598b1..84f9db4 100644
--- a/Documentation/linux_tv/media/v4l/vidioc-g-dv-timings.rst
+++ b/Documentation/linux_tv/media/v4l/vidioc-g-dv-timings.rst
@@ -1,6 +1,6 @@
 .. -*- coding: utf-8; mode: rst -*-
 
-.. _vidioc-g-dv-timings:
+.. _VIDIOC_G_DV_TIMINGS:
 
 **********************************************
 ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS
@@ -47,7 +47,7 @@
 The ``linux/v4l2-dv-timings.h`` header can be used to get the timings of
 the formats in the :ref:`cea861` and :ref:`vesadmt` standards. If
 the current input or output does not support DV timings (e.g. if
-:ref:`VIDIOC_ENUMINPUT <vidioc-enuminput>` does not set the
+:ref:`VIDIOC_ENUMINPUT <VIDIOC_ENUMINPUT>` does not set the
 ``V4L2_IN_CAP_DV_TIMINGS`` flag), then ENODATA error code is returned.