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-sliced-vbi-cap.rst b/Documentation/linux_tv/media/v4l/vidioc-g-sliced-vbi-cap.rst
index c76f568..8c86d2b 100644
--- a/Documentation/linux_tv/media/v4l/vidioc-g-sliced-vbi-cap.rst
+++ b/Documentation/linux_tv/media/v4l/vidioc-g-sliced-vbi-cap.rst
@@ -1,6 +1,6 @@
 .. -*- coding: utf-8; mode: rst -*-
 
-.. _vidioc-g-sliced-vbi-cap:
+.. _VIDIOC_G_SLICED_VBI_CAP:
 
 *****************************
 ioctl VIDIOC_G_SLICED_VBI_CAP
@@ -134,7 +134,7 @@
           given line may be limited. For example on PAL line 16 the hardware
           may be able to look for a VPS or Teletext signal, but not both at
           the same time. Applications can learn about these limits using the
-          :ref:`VIDIOC_S_FMT <vidioc-g-fmt>` ioctl as described in
+          :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` ioctl as described in
           :ref:`sliced`.
 
     -  .. row 10