sphinx: history: Move revision history to its own section

The revision history tables look better in their own section,
move them.

(From yocto-docs rev: 27bf0f69b6dc04cea97a023ef52bec2b213d074f)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/kernel-dev/kernel-dev.rst

@@ -6,59 +6,6 @@ Yocto Project Linux Kernel Development Manual
 
 .. include:: /boilerplate.rst
 
-.. list-table::
-   :widths: 10 15 40
-   :header-rows: 1
-
-   * - Revision
-     - Date
-     - Note
-   * - 1.4
-     - April 2013
-     - The initial document released with the Yocto Project 1.4 Release
-   * - 1.5
-     - October 2013
-     - Released with the Yocto Project 1.5 Release.
-   * - 1.6
-     - April 2014
-     - Released with the Yocto Project 1.6 Release.
-   * - 1.7
-     - October 2014
-     - Released with the Yocto Project 1.7 Release.
-   * - 1.8
-     - April 2015
-     - Released with the Yocto Project 1.8 Release.
-   * - 2.0
-     - October 2015
-     - Released with the Yocto Project 2.0 Release.
-   * - 2.1
-     - April 2016
-     - Released with the Yocto Project 2.1 Release.
-   * - 2.2
-     - October 2016
-     - Released with the Yocto Project 2.2 Release.
-   * - 2.3
-     - May 2017
-     - Released with the Yocto Project 2.3 Release.
-   * - 2.4
-     - October 2017
-     - Released with the Yocto Project 2.4 Release.
-   * - 2.5
-     - May 2018
-     - Released with the Yocto Project 2.5 Release.
-   * - 2.6
-     - November 2018
-     - Released with the Yocto Project 2.6 Release.
-   * - 2.7
-     - May 2019
-     - Released with the Yocto Project 2.7 Release.
-   * - 3.0
-     - October 2019
-     - Released with the Yocto Project 3.0 Release.
-   * - 3.1
-     - April 2020
-     - Released with the Yocto Project 3.1 Release.
-
 .. toctree::
    :caption: Table of Contents
    :numbered:
@@ -69,3 +16,4 @@ Yocto Project Linux Kernel Development Manual
    kernel-dev-concepts-appx
    kernel-dev-maint-appx
    kernel-dev-faq
+   history