Doc: Add changelog for 1.1 release

Create changelog document for 1.1 release and add it to the main
changelog document.
Add 1.1 release to readme.rst
Update version number in tfm_version.h
Update version number in Doxygen CMake files.

Change-Id: Icb81ab1e5994228772884c7a1dcb878533dcfa33
Signed-off-by: Mate Toth-Pal <mate.toth-pal@arm.com>
diff --git a/docs/introduction/readme.rst b/docs/introduction/readme.rst
index 00fc780..7e214c2 100644
--- a/docs/introduction/readme.rst
+++ b/docs/introduction/readme.rst
@@ -167,19 +167,21 @@
 ###############
 Version history
 ###############
-+-------------+--------------+--------------------+---------------+
-| Version     | Date         | Description        | PSA-arch tag  |
-+=============+==============+====================+===============+
-| v1.0-beta   | 2019-02-15   | 1.0-beta release   |       -       |
-+-------------+--------------+--------------------+---------------+
-| v1.0-RC1    | 2019-05-31   | 1.0-RC1 release    | v19.06_API0.9 |
-+-------------+--------------+--------------------+---------------+
-| v1.0-RC2    | 2019-10-09   | 1.0-RC2 release    | v19.06_API0.9 |
-+-------------+--------------+--------------------+---------------+
-| v1.0-RC3    | 2019-11-29   | 1.0-RC3 release    | v19.06_API0.9 |
-+-------------+--------------+--------------------+---------------+
-| v1.0        | 2020-03-27   | 1.0 release        | v20.03_API1.0 |
-+-------------+--------------+--------------------+---------------+
++-------------+--------------+--------------------+-------------------+
+| Version     | Date         | Description        | PSA-arch tag/hash |
++=============+==============+====================+===================+
+| v1.0-beta   | 2019-02-15   | 1.0-beta release   |       -           |
++-------------+--------------+--------------------+-------------------+
+| v1.0-RC1    | 2019-05-31   | 1.0-RC1 release    | v19.06_API0.9     |
++-------------+--------------+--------------------+-------------------+
+| v1.0-RC2    | 2019-10-09   | 1.0-RC2 release    | v19.06_API0.9     |
++-------------+--------------+--------------------+-------------------+
+| v1.0-RC3    | 2019-11-29   | 1.0-RC3 release    | v19.06_API0.9     |
++-------------+--------------+--------------------+-------------------+
+| v1.0        | 2020-03-27   | 1.0 release        | v20.03_API1.0     |
++-------------+--------------+--------------------+-------------------+
+| v1.1        | 2020-07-15   | 1.1 release        | 1f960947          |
++-------------+--------------+--------------------+-------------------+
 
 .. _Cortex-M33: https://developer.arm.com/ip-products/processors/cortex-m/cortex-m33
 .. _Cortex-M23: https://developer.arm.com/ip-products/processors/cortex-m/cortex-m23