refactor(docs): added versioning to smccc services

With addition of vendor-specific el3 monitor service calls debugfs and
pmf are moved from arm-sip to vendor-specific el3 range.

Going forward any changes to SMCCC services can be captured from docs
file table.

Use one FID allocated per sub-feature to track changes in sub-feature.
Modify top level version only when we break version probing or
discovery.

Change-Id: I14ceeab79f29ae57a5d7c523147f6ecaa5574f79
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/docs/components/arm-sip-service.rst b/docs/components/arm-sip-service.rst
index 4445fb1..74a40a3 100644
--- a/docs/components/arm-sip-service.rst
+++ b/docs/components/arm-sip-service.rst
@@ -20,6 +20,15 @@
 Source definitions for Arm SiP service are located in the ``arm_sip_svc.h`` header
 file.
 
++----------------------------+----------------------------+---------------------------------------+
+| ARM_SIP_SVC_VERSION_MAJOR  | ARM_SIP_SVC_VERSION_MINOR  | Changes                               |
++============================+============================+=======================================+
+|                          1 |                          0 | Move DebugFS and PMF to the new vendor|
+|                            |                            | specific FID range. The old FID range |
+|                            |                            | for these services are deprecated     |
++----------------------------+----------------------------+---------------------------------------+
+
+*Table 1: Showing different versions of arm-sip-service and changes done with each version*
 
 Execution State Switching service
 ---------------------------------