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).

Change-Id: I4ab10adb9ffeef1ff784641dfafd99f515133760
Signed-off-by: J-Alves <joao.alves@arm.com>
diff --git a/docs/glossary.rst b/docs/glossary.rst
index 3da30b0..e087079 100644
--- a/docs/glossary.rst
+++ b/docs/glossary.rst
@@ -57,6 +57,9 @@
    FDT
       Flattened Device Tree
 
+   FFA
+      Firmware Framework for A-class processors
+
    FIP
       Firmware Image Package
 
@@ -107,6 +110,9 @@
    PMF
       Performance Measurement Framework
 
+   PSA
+      Platform Security Architecture
+
    PSCI
       Power State Coordination Interface
 
@@ -149,9 +155,6 @@
    SP
       Secure Partition
 
-   SPCI
-      Secure Partition Client Interface
-
    SPD
       Secure Payload Dispatcher