SPM: Remove "spm request" function

Remove the unused "spm request" function.
Move the library-model-only header to its folder.

Change-Id: Iff1daddaa15841903dce51494735c86992b850f0
Signed-off-by: Mingyang Sun <mingyang.sun@arm.com>
diff --git a/secure_fw/spm/include/interface/svc_num.h b/secure_fw/spm/include/interface/svc_num.h
index 7a3c3c5..2b88e16 100644
--- a/secure_fw/spm/include/interface/svc_num.h
+++ b/secure_fw/spm/include/interface/svc_num.h
@@ -39,10 +39,9 @@
 #define TFM_SVC_PSA_IRQ_DISABLE         (0x12)
 #define TFM_SVC_PSA_RESET_SIGNAL        (0x13)
 /* TF-M specific, starts from 0x40 */
-#define TFM_SVC_SPM_REQUEST             (0x40)
-#define TFM_SVC_GET_BOOT_DATA           (0x41)
-#define TFM_SVC_SPM_INIT                (0x42)
-#define TFM_SVC_FLIH_FUNC_RETURN        (0x43)
+#define TFM_SVC_GET_BOOT_DATA           (0x40)
+#define TFM_SVC_SPM_INIT                (0x41)
+#define TFM_SVC_FLIH_FUNC_RETURN        (0x42)
 #define TFM_SVC_THREAD_NUMBER_END       (0x7F)
 #if (TFM_SPM_LOG_LEVEL > TFM_SPM_LOG_LEVEL_SILENCE)
 #define TFM_SVC_OUTPUT_UNPRIV_STRING    (TFM_SVC_THREAD_NUMBER_END)