SPCI is now called PSA FF-A

SPCI is renamed as PSA FF-A which stands for Platform Security
Architecture Firmware Framework for A class processors.
This patch replaces the occurrence of SPCI with PSA FF-A(in documents)
or simply FFA(in code).

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: I17728c1503312845944a5ba060c252c2b98f3e91
diff --git a/spm/cactus/cactus_debug.c b/spm/cactus/cactus_debug.c
index cce0973..91fbfda 100644
--- a/spm/cactus/cactus_debug.c
+++ b/spm/cactus/cactus_debug.c
@@ -8,7 +8,7 @@
 #include <drivers/console.h>
 
 #include "cactus.h"
-#include "spci_helpers.h"
+#include "ffa_helpers.h"
 
 static int (*putc_impl)(int);