doc-rst: linux_tv: don't use uppercases for syscall sections

On the syscall conversions, we used uppercase for the sections,
but this is too bold. So, convert them to Camel Case, as it
looks visually better.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
diff --git a/Documentation/linux_tv/media/v4l/vidioc-g-input.rst b/Documentation/linux_tv/media/v4l/vidioc-g-input.rst
index e069ba3..29e22f6 100644
--- a/Documentation/linux_tv/media/v4l/vidioc-g-input.rst
+++ b/Documentation/linux_tv/media/v4l/vidioc-g-input.rst
@@ -6,18 +6,19 @@
 ioctl VIDIOC_G_INPUT, VIDIOC_S_INPUT
 ************************************
 
-NAME
+Name
 ====
 
 VIDIOC_G_INPUT - VIDIOC_S_INPUT - Query or select the current video input
 
-SYNOPSIS
+
+Synopsis
 ========
 
 .. cpp:function:: int ioctl( int fd, int request, int *argp )
 
 
-ARGUMENTS
+Arguments
 =========
 
 ``fd``
@@ -29,7 +30,7 @@
 ``argp``
 
 
-DESCRIPTION
+Description
 ===========
 
 To query the current video input applications call the
@@ -50,7 +51,7 @@
 :ref:`VIDIOC_ENUMINPUT` ioctl.
 
 
-RETURN VALUE
+Return Value
 ============
 
 On success 0 is returned, on error -1 and the ``errno`` variable is set