Removed wrong inheritance of SCDP and SCBR from Disk class (#948)

* Fixed TODOs, updated SCBR and SCDP

* Introduced ByteWriter interface

* Use accessors instead of directly accessing length/block fields

cpp/devices/interfaces/byte_writer.h

@@ -0,0 +1,28 @@
+//---------------------------------------------------------------------------
+//
+// SCSI Target Emulator RaSCSI Reloaded
+// for Raspberry Pi
+//
+// Copyright (C) 2022 Uwe Seimet
+//
+// Abstraction for the DaynaPort and the host bridge, which both have methods for writing byte sequences
+//
+//---------------------------------------------------------------------------
+
+#pragma once
+
+#include "os.h"
+#include <vector>
+
+using namespace std;
+
+class ByteWriter
+{
+
+public:
+
+	ByteWriter() = default;
+	virtual ~ByteWriter() = default;
+
+	virtual bool WriteBytes(const vector<int>&, vector<BYTE>&, uint32_t) = 0;
+};