Example: Add TF-M example partition

Change-Id: I52f2f24af2c9ed239d033c62c7c7bea7b431311c
Co-authored-by: Jamie Fox <jamie.fox@arm.com>
Signed-off-by: Jamie Fox <jamie.fox@arm.com>
diff --git a/example_partition/tfm_example_partition_api.h b/example_partition/tfm_example_partition_api.h
new file mode 100644
index 0000000..f8876ef
--- /dev/null
+++ b/example_partition/tfm_example_partition_api.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2020, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef __TFM_EXAMPLE_PARTITION_API_H__
+#define __TFM_EXAMPLE_PARTITION_API_H__
+
+#include <stdint.h>
+
+#include "psa/error.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * \brief Makes a psa_call to the example partition.
+ *
+ * \param[in] arg  Example parameter
+ *
+ * \return Returns error code as specified in \ref psa_status_t
+ */
+psa_status_t tfm_example_partition_call(uint32_t arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __TFM_EXAMPLE_PARTITION_API_H__ */