Platform: Rename Polaris to Corstone-310

Changed Corstone Polaris to Corstone-310 and
Olympus to Cortex-M85. Updated the README.rst.

Change-Id: I1a2821664252fa40f53b4f92fcb437bb4a187efc
Signed-off-by: Bence Balogh <bence.balogh@arm.com>
diff --git a/docs/platform/ext/platform_introduction.rst b/docs/platform/ext/platform_introduction.rst
index be7e268..ae03d62 100644
--- a/docs/platform/ext/platform_introduction.rst
+++ b/docs/platform/ext/platform_introduction.rst
@@ -2,9 +2,10 @@
 Supported Platforms
 ###################
 
-    - Olympus system
+    - Cortex-M85 system:
 
-        - Corstone-Polaris Ethos-U55 FVP (Olympus CPU plus Ethos-U55)
+        - `Corstone-310 Ethos-U55 FVP.
+          <https://arm-software.github.io/AVH/main/simulation/html/Using.html>`_
 
     - Cortex-M55 system:
 
@@ -12,7 +13,7 @@
           <https://developer.arm.com/tools-and-software/development-boards/fpga-prototyping-boards/download-fpga-images>`_
         - `FPGA image loaded on MPS3 board (AN552).
           <https://developer.arm.com/tools-and-software/development-boards/fpga-prototyping-boards/download-fpga-images>`_
-        - `Corstone-300 Ethos-U55 Ecosystem FVP
+        - `Corstone-300 Ethos-U55 Ecosystem FVP.
           <https://developer.arm.com/tools-and-software/open-source-software/arm-platforms-software/arm-ecosystem-fvps>`_