SPM: Rename spm_ipc.h to spm.h

This file is also used in SFN backend.

Signed-off-by: Sherry Zhang <sherry.zhang2@arm.com>
Change-Id: I4818edfbca3b84414db4ac5d7d8293f0e0c41276
diff --git a/secure_fw/spm/ffm/psa_api.c b/secure_fw/spm/ffm/psa_api.c
index 4ad63a4..35561fb 100644
--- a/secure_fw/spm/ffm/psa_api.c
+++ b/secure_fw/spm/ffm/psa_api.c
@@ -16,7 +16,7 @@
 #include "psa/lifecycle.h"
 #include "psa/service.h"
 #include "interrupt.h"
-#include "spm_ipc.h"
+#include "spm.h"
 #include "tfm_arch.h"
 #include "load/partition_defs.h"
 #include "load/service_defs.h"