Added TMC2160 driver that is essentially the same as TMC5160

FluidNC/src/Motors/TMC2160Driver.cpp

@@ -0,0 +1,12 @@
+// Copyright (c) 2020 -	Bart Dring
+// Use of this source code is governed by a GPLv3 license that can be found in the LICENSE file.
+
+#include "TMC2160Driver.h"
+#include "../Machine/MachineConfig.h"
+
+namespace MotorDrivers {
+    // Configuration registration
+    namespace {
+        MotorFactory::InstanceBuilder<TMC2160Driver> registration("tmc_2160");
+    }
+}

FluidNC/src/Motors/TMC2160Driver.h

@@ -0,0 +1,13 @@
+// Copyright (c) 2020 -	Bart Dring
+// Use of this source code is governed by a GPLv3 license that can be found in the LICENSE file.
+
+#pragma once
+
+#include "TMC5160Driver.h"
+
+namespace MotorDrivers {
+    class TMC2160Driver : public TMC5160Driver {
+    public:
+        TMC2160Driver(const char* name) : TMC5160Driver(name) {}
+    };
+}