Docs: Correct name of Corstone-300 platform

Change-Id: Iff0b9c57541bd39f023880835786997806d9d98f
Signed-off-by: Marton Berke <marton.berke@arm.com>
diff --git a/docs/getting_started/tfm_integration_guide.rst b/docs/getting_started/tfm_integration_guide.rst
index e4b56d1..1ede080 100644
--- a/docs/getting_started/tfm_integration_guide.rst
+++ b/docs/getting_started/tfm_integration_guide.rst
@@ -22,7 +22,7 @@
 - Soft Macro Model (SMM) Cortex-M33 SSE-200 subsystem for MPS2+ (AN521)
 - Cortex-M23 IoT Kit subsystem for MPS2+ (AN519)
 - Arm SSE-123 Example Subsystem for MPS2+ (AN539)
-- Cortex-M55 SSE-300 subsystem for MPS2+ FVP
+- Corstone-300 Ecosystem FVP (Cortex-M55 SSE-300 MPS2+)
 - Musca-A test chip board (Cortex-M33 SSE-200 subsystem)
 - Musca-B1 test chip board (Cortex-M33 SSE-200 subsystem)
 - Musca-S1 test chip board (Cortex-M33 SSE-200 subsystem)