Platform: Add FVP_SSE300_MPS2 target

Add support for FVP_SSE300_MPS2 platform

Change-Id: Ieddb5adbdc0cc47690bbe0b3dfbaf39d005d03ea
Signed-off-by: Mark Horvath <mark.horvath@arm.com>
Signed-off-by: Marton Berke <marton.berke@arm.com>
diff --git a/docs/user_guides/tfm_build_instruction_iar.rst b/docs/user_guides/tfm_build_instruction_iar.rst
index 847587a..b62d51d 100644
--- a/docs/user_guides/tfm_build_instruction_iar.rst
+++ b/docs/user_guides/tfm_build_instruction_iar.rst
@@ -12,7 +12,7 @@
     IAR Embedded Workbench for ARM (EWARM) versions 8.42 or later are required.
 
     Currently the MUSCA_B1, MUSCA_S1 and SSE-200_AWS targets are not supported with IARARM,
-    due to lack of testing.
+    due to lack of testing. The FVP_SSE300_MPS2 target is currently not supported by IARARM.
 
     bash needs to be installed and used by cmake for the build steps.