SWDEV-209060 - Create the Skeleton RDC CLI and daemon

Create the skeleton implementation of rdc_client.so and rdci. Modify current rdcd to
integrate the RDC API service:

rdc.proto is changed to add a new RdcAPI service which defined the interfaces for the RDC API.

RdcStandaloneHandler.cpp is added to send the request using gRPC to the rdcd. It is built into
the rdc_client.so

rdci.cc, RdciDisCoverySubSystem.cc and RdciSubSystem.cc are added to implement skeleton rdci.
Currently, the discovery subsystem is supported.

rdc_api_service.cc is added to the server as a skeleton to implement the RdcAPI service. Currently,
only discovery API is implemented. Note: we disabled the rdc_rsmi_service, which will be removed
in the future. The original rdc_client.so is renamed to rdc_client_smi.so which should also be
removed in the future.

Add the instruction how to run the rdcd and rdci in the build folder in the README.md.

Change-Id: Id232f9f83787e5812d4a295dc8cf0daa7728b06c

rdci/include/RdciSubSystem.h

@@ -0,0 +1,52 @@
+/*
+Copyright (c) 2020 - 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_RDCISUBSYSTEM_H_
+#define RDCI_INCLUDE_RDCISUBSYSTEM_H_
+
+#include <memory>
+#include <string>
+#include "rdc_lib/rdc_common.h"
+#include "rdc/rdc.h"
+
+namespace amd {
+namespace rdc {
+
+class RdciSubSystem {
+ public:
+     RdciSubSystem();
+     virtual void parse_cmd_opts(int argc, char ** argv) = 0;
+     virtual void connect();
+
+     virtual void process() = 0;
+     virtual ~RdciSubSystem();
+ protected:
+     rdc_handle_t rdc_handle_;
+     std::string ip_port_;
+};
+
+typedef std::shared_ptr<RdciSubSystem> RdciSubSystemPtr;
+
+}  // namespace rdc
+}  // namespace amd
+
+
+#endif  // RDCI_INCLUDE_RDCISUBSYSTEM_H_