Add new init and destroy API for RAS library.

RAS library will provide two new APIs:
rdc_status_t rdc_module_init(uint64_t flags);
rdc_status_t rdc_module_destroy();

When RDC load the librdc_ras.so, it will call rdc_module_init().
When RDC exit, it will call rdc_module_destroy()

Change-Id: I7f5c81fd19a45a906c3c339cd6eabee2277f27ca

include/rdc_lib/impl/RdcRasLib.h

@@ -53,11 +53,16 @@ class RdcRasLib: public RdcTelemetry {
 
     explicit RdcRasLib(const char* lib_name);
 
+    ~RdcRasLib();
+
  private:
     RdcLibraryLoader lib_loader_;
     rdc_status_t (*fields_value_get_)(rdc_gpu_field_t*,
                 uint32_t, rdc_field_value_f, void*);
     rdc_status_t (*fields_query_)(uint32_t[MAX_NUM_FIELDS], uint32_t*);
+
+    rdc_status_t (*rdc_module_init_)(uint64_t);
+    rdc_status_t (*rdc_module_destroy_)();
 };
 typedef std::shared_ptr<RdcRasLib> RdcRasLibPtr;