media: vidioc-querycap: use a more realistic value for KERNEL_VERSION

In the past, V4L2 versions were 0.x.y, but that changed years
ago. Since Kernel 3.1, however, the numbering schema was changed
to match the Kernel version.

However, the presented example still uses the old numerating
schema, with is a misleading information.

So, update it to the new schema.
Signed-off-by: NMauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/uapi/v4l/vidioc-querycap.rst

@@ -92,12 +92,13 @@ specification the ioctl returns an ``EINVAL`` error code.
 	stack from a newer kernel.
 
 	The version number is formatted using the ``KERNEL_VERSION()``
-	macro:
+	macro. For example if the media stack corresponds to the V4L2
+	version shipped with Kernel 4.14, it would be equivalent to:
     * - :cspan:`2`
 
 	``#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))``
 
-	``__u32 version = KERNEL_VERSION(0, 8, 1);``
+	``__u32 version = KERNEL_VERSION(4, 14, 0);``
 
 	``printf ("Version: %u.%u.%u\\n",``