Platform: RP2350: Add RP2350 porting

Change-Id: I8359f2a0ccea6a5afade57fc651aa90dae678307
Signed-off-by: William Vinnicombe <william.vinnicombe@raspberrypi.com>
diff --git a/docs/platform/rpi/index.rst b/docs/platform/rpi/index.rst
new file mode 100644
index 0000000..6ad40a6
--- /dev/null
+++ b/docs/platform/rpi/index.rst
@@ -0,0 +1,14 @@
+######################
+Raspberry Pi platforms
+######################
+
+.. toctree::
+    :maxdepth: 1
+    :titlesonly:
+
+    RP2350 <rp2350/readme.rst>
+
+--------------
+
+ *SPDX-License-Identifier: BSD-3-Clause*
+ *SPDX-FileCopyrightText: Copyright The TrustedFirmware-M Contributors*