Core: Move spm header files to 'spm' folder

- Move 'spm_xxx.h' to 'spm' folder, they should belong to 'spm'.
- Fix and simplify inclusion of header file.
- Fix format and typo error.

Change-Id: I129c6626ddffbbdba0e7edc27e9307f0d6ea9b79
Signed-off-by: Mingyang Sun <mingyang.sun@arm.com>
diff --git a/secure_fw/spm/model_func/spm_func.c b/secure_fw/spm/model_func/spm_func.c
index 9f040b8..65c63b5 100644
--- a/secure_fw/spm/model_func/spm_func.c
+++ b/secure_fw/spm/model_func/spm_func.c
@@ -18,8 +18,8 @@
 #include "tfm_peripherals_def.h"
 #include "tfm_secure_api.h"
 #include "tfm_spm_hal.h"
-#include "tfm/spm_api.h"
-#include "tfm/spm_db.h"
+#include "spm_api.h"
+#include "spm_db.h"
 #include "region_defs.h"
 #include "region.h"
 #include "tfm/tfm_spm_services_api.h"