Docs: Update FP support for SFN model

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ib99f80b34ef8aafeb2c0dc78b49f0f924d8d14d4
diff --git a/docs/integration_guide/tfm_fpu_support.rst b/docs/integration_guide/tfm_fpu_support.rst
index 6fee04a..69dc8d5 100644
--- a/docs/integration_guide/tfm_fpu_support.rst
+++ b/docs/integration_guide/tfm_fpu_support.rst
@@ -14,8 +14,7 @@
 * Support GNU Arm Embedded Toolchain [3]_. ``GNU Arm Embedded Toolchain 10.3-
   2021.10`` and later version shall be used to mitigate VLLDM instruction
   security vulnerability [4]_.
-* Support Inter-Process Communication (IPC) [5]_ model in TF-M, and doesn't
-  support SFN model.
+* Support both IPC [5]_ and SFN [11]_ models in TF-M.
 * Support Armv8-M mainline.
 * Support isolation level 1,2,3.
 * Support Arm Compiler for Embedded [10]_. ``Arm Compiler for Embedded 6.17``
@@ -151,6 +150,8 @@
 
 .. [10] `Arm Compiler for Embedded <https://developer.arm.com/Tools%20and%20Software/Arm%20Compiler%20for%20Embedded>`_
 
+.. [11] `FF-M v1.1 Extension <https://developer.arm.com/documentation/aes0039/latest/>`__
+
 --------------
 
-*Copyright (c) 2021-2022, Arm Limited. All rights reserved.*
+*Copyright (c) 2021-2023, Arm Limited. All rights reserved.*