docs(xilinx): update SMC documentation in TF-A

Updated documentation for new SMC SiP calling conventions for Platform
Management specific SiP Service calls.

Signed-off-by: Jay Buddhabhatti <jay.buddhabhatti@amd.com>
Change-Id: Iee09d3d843c6bb3f82aad6df703542ba1eb63c6c
diff --git a/docs/plat/xilinx-versal-net.rst b/docs/plat/xilinx-versal-net.rst
index e9dd772..d22a46d 100644
--- a/docs/plat/xilinx-versal-net.rst
+++ b/docs/plat/xilinx-versal-net.rst
@@ -75,7 +75,7 @@
 | 0xc2001000-0xc2001FFF     | Fast SMC64 SiP Service call range used for AMD-Xilinx IPI |
 +---------------------------+-----------------------------------------------------------+
 
-PM SMC call ranges
+PM SMC call ranges for SiP SVC version 0.1
 --------------------------------------------------------
 
 +---------------------------+---------------------------------------------------------------------------+
@@ -84,6 +84,19 @@
 | 0xc2000000-0xc2000FFF     | Fast SMC64 SiP Service call range used for AMD-Xilinx Platform Management |
 +---------------------------+---------------------------------------------------------------------------+
 
+PM SMC call ranges for SiP SVC version 0.2
+--------------------------------------------------------
+
++---------------------------+---------------------------------------------------------------------------+
+|   SMC Function Identifier |  Service type                                                             |
++---------------------------+---------------------------------------------------------------------------+
+| 0xc2000FFF                | Fast SMC64 SiP Service call used for pass-through of AMD-Xilinx Platform  |
+|                           | Management APIs to firmware                                               |
++---------------------------+---------------------------------------------------------------------------+
+| 0xc2000A00-0xc2000AFF     | Fast SMC64 SiP Service call range used for AMD-Xilinx Platform Management |
+|                           | specific TF-A APIs                                                        |
++---------------------------+---------------------------------------------------------------------------+
+
 SMC function IDs for SiP Service queries
 ----------------------------------------------