SPM: Depreciate vague header 'tfm_internal.h'

The name of this file is vague. Depreciate it by:
 - Remove tfm_internal.h
 - Move function model architecture code into a new create arch.h
 - Create tfm_boot_data.h and put boot related function declaration
   in it

Change-Id: Ia2ad1b0f95c1137624f99a4e81807bedf9086857
Signed-off-by: Summer Qin <summer.qin@arm.com>
diff --git a/secure_fw/spm/common/tfm_boot_data.h b/secure_fw/spm/common/tfm_boot_data.h
new file mode 100644
index 0000000..3df9fe6
--- /dev/null
+++ b/secure_fw/spm/common/tfm_boot_data.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2020, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef __TFM_BOOT_DATA_H__
+#define __TFM_BOOT_DATA_H__
+
+#include <stdint.h>
+
+/**
+ * \brief Retrieve secure partition related data from shared memory area, which
+ *        stores shared data between bootloader and runtime firmware.
+ *
+ * \param[in] args  Pointer to stack frame, which carries input parameters.
+ */
+void tfm_core_get_boot_data_handler(uint32_t args[]);
+
+/**
+ * \brief Validate the content of shared memory area, which stores the shared
+ *        data between bootloader and runtime firmware.
+ */
+void tfm_core_validate_boot_data(void);
+
+#endif /* __TFM_BOOT_DATA_H__ */