Initial setup for SMS implementation

# Explain what has been changed

# Explain why this change is being made

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DRAMSys/simulator/src/controller/scheduler/SMS.cpp

@@ -0,0 +1,13 @@
+#include "SMS.h"
+
+using namespace std;
+
+void SMS::schedule (gp *payload)
+{
+    buffer[DramExtension::getExtension(payload).getThread()].emplace_back(payload);
+}
+
+std::pair<Command, gp*> SMS::getNextRequest(Bank bank)
+{
+  return pair<Command, tlm::tlm_generic_payload*>(Command::NOP, NULL);
+}