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/src/RdciSubSystem.cc

@@ -0,0 +1,56 @@
+/*
+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.
+*/
+#include "RdciSubSystem.h"
+#include "RdcException.h"
+
+namespace amd {
+namespace rdc {
+
+RdciSubSystem::RdciSubSystem():
+    rdc_handle_(nullptr)
+    , ip_port_("localhost:50051") {  // default host
+     rdc_status_t status = rdc_init(0);
+     if (status != RDC_ST_OK) {
+         throw RdcException(status, "RDC initialize fail");
+     }
+}
+
+void RdciSubSystem::connect() {
+    rdc_status_t status = rdc_connect(ip_port_.c_str(), &rdc_handle_);
+    if (status != RDC_ST_OK) {
+        throw RdcException(status, "Fail to setup the connection");
+    }
+}
+
+
+RdciSubSystem::~RdciSubSystem() {
+    if (rdc_handle_) {
+       rdc_disconnect(rdc_handle_);
+       rdc_handle_ = nullptr;
+    }
+
+    rdc_shutdown();
+}
+
+
+}  // namespace rdc
+}  // namespace amd