Add trustzone application example

Add example project that builds both secure and nonsecure world
sides and the inference is done on the secure side.
This commit includes the mpc driver as found in the upstream
trustedfirmware git repository
https://git.trustedfirmware.org/TF-M/trusted-firmware-m.git
(8c0a234e453b51e6606d11599d0cb15097c3da48)

The model,input and output used are described in the README.md in this
directory.

Change-Id: Ie54904a38d54df4de2d6936f066c388ea58e396b
diff --git a/targets/corstone-300/platform.scatter b/targets/corstone-300/platform.scatter
index 2ab371f..b8d5495 100644
--- a/targets/corstone-300/platform.scatter
+++ b/targets/corstone-300/platform.scatter
@@ -39,7 +39,7 @@
 #else //TRUSTZONE_BUILD
 
 #define LR_START   0x10000000
-#define LR_SIZE    0x01000000
+#define LR_SIZE    0x00080000
 
 #define ITCM_START 0x10000000
 #define ITCM_SIZE  0x00080000