Added Power Supply Redundancy Sensor support for Witherspoon

Change-Id: Ie007597516d9da00b6bbe6be56084bf4ac790a19
Signed-off-by: Dhruvaraj Subhashchandran <dhruvaraj@in.ibm.com>
diff --git a/pystatemgr/discover_system_state.py b/pystatemgr/discover_system_state.py
index e52017a..e25e66e 100644
--- a/pystatemgr/discover_system_state.py
+++ b/pystatemgr/discover_system_state.py
@@ -39,6 +39,11 @@
         'object_name': '/org/openbmc/managers/System',
         'interface_name': 'org.freedesktop.DBus.Properties'
     },
+    'powersupplyredundancy': {
+        'bus_name': 'org.openbmc.Sensors',
+        'object_name': '/org/openbmc/sensors/host/PowerSupplyRedundancy',
+        'interface_name': 'org.freedesktop.DBus.Properties'
+    },
 }