Add missing documentation

Changes:
Add missing documentation in test scripts

Tested:
NA

Change-Id: I7edfde924df15bce78e77010484eb25bf8ee1caf
Signed-off-by: Sridevi Ramesh <sridevra@in.ibm.com>
diff --git a/lib/bmc_date_and_time_utils.robot b/lib/bmc_date_and_time_utils.robot
index 0140b11..6dde95c 100644
--- a/lib/bmc_date_and_time_utils.robot
+++ b/lib/bmc_date_and_time_utils.robot
@@ -87,6 +87,8 @@
 Set NTP state
     [Documentation]  Set NTP service inactive.
     [Arguments]  ${state}
+    # Description of argument(s):
+    # state      NTP protocol state (True/False).
 
     Redfish.Patch  ${REDFISH_NW_PROTOCOL_URI}  body={'NTP':{'ProtocolEnabled': ${state}}}
     ...  valid_status_codes=[${HTTP_OK}, ${HTTP_NO_CONTENT}]