psa-client-server: move psasim from framework repo to the mbedtls one

This is a temporary fix that will be reverted once the framework
repository will have CI checks.

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/psa-client-server/psasim/test/client.c b/tests/psa-client-server/psasim/test/client.c
new file mode 100644
index 0000000..5bde82f
--- /dev/null
+++ b/tests/psa-client-server/psasim/test/client.c
@@ -0,0 +1,48 @@
+/* psasim test client */
+
+/*
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include <psa/client.h>
+#include <psa/util.h>
+#include "psa_manifest/sid.h"
+#include <stdio.h>
+#include <unistd.h>
+
+#define CLIENT_PRINT(fmt, ...) \
+    PRINT("Client: " fmt, ##__VA_ARGS__)
+
+int main()
+{
+    const char *text = "FOOBARCOOL!!";
+    char output[100] = { 0 };
+    CLIENT_PRINT("My PID: %d", getpid());
+
+    CLIENT_PRINT("PSA version: %u", psa_version(PSA_SID_SHA256_SID));
+    psa_handle_t h = psa_connect(PSA_SID_SHA256_SID, 1);
+
+    if (h < 0) {
+        CLIENT_PRINT("Couldn't connect %d", h);
+        return 1;
+    } else {
+        int type = 2;
+        CLIENT_PRINT("psa_call() w/o invec returned: %d", psa_call(h, type, NULL, 0, NULL, 0));
+        psa_invec invecs[1];
+        psa_outvec outvecs[1];
+        invecs[0].base = text;
+        invecs[0].len = sizeof(text);
+        outvecs[0].base = output;
+        outvecs[0].len = sizeof(output);
+
+        CLIENT_PRINT("invec len: %lu", invecs[0].len);
+        CLIENT_PRINT("psa_call() w/ invec returned: %d", psa_call(h, type, invecs, 1, outvecs, 1));
+        CLIENT_PRINT("Received payload len: %ld", outvecs[0].len);
+        CLIENT_PRINT("Received payload content: %s", output);
+        CLIENT_PRINT("Closing handle");
+        psa_close(h);
+    }
+
+    return 0;
+}