Enable RDC link Status feature

1.add link status APIs
   2.Add link status example for link status API usage

rdci/include/RdciTopologyLinkSubSystem.h

@@ -34,7 +34,7 @@ class RdciTopologyLinkSubSystem : public RdciSubSystem {
  private:
   void show_help() const;
   enum OPERATIONS {
-    POLICY_UNKNOWN = 0,
+    TOPOLOGY_UNKNOWN = 0,
     TOPOLOGY_INDEX,
   } topology_ops_;
   uint32_t group_index_;

rdci/include/RdciXgmiLinkStatusSubSystem.h

@@ -0,0 +1,43 @@
+/*
+Copyright (c) 2024 - present Advanced Micro Devices, Inc. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+#ifndef RDCI_INCLUDE_RDCIXMGILINKSTATUSSYSTEM_H_
+#define RDCI_INCLUDE_RDCIXMGILINKSTATUSSYSTEM_H_
+#include <signal.h>
+
+#include <string>
+
+#include "RdciSubSystem.h"
+namespace amd {
+namespace rdc {
+class RdciXgmiLinkStatusSubSystem : public RdciSubSystem {
+ public:
+  RdciXgmiLinkStatusSubSystem();
+  void parse_cmd_opts(int argc, char** argv) override;
+  void process() override;
+
+ private:
+  void show_help() const;
+  enum OPERATIONS {
+    XMGI_LINK_UNKNOWN = 0,
+    XMGI_LINK_STATUS,
+  } link_status_ops_;
+};
+}  // namespace rdc
+}  // namespace amd
+#endif  // RDCI_INCLUDE_RDCIXMGILINKSTATUSSYSTEM_H_