[WDF] Add Windows Driver Framework files

Takern from Microsoft GitHub repo:
d9c6040fe9

Licensed under MIT

sdk/lib/drivers/wdf/shared/inc/private/common/fxiotargetself.hpp

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+/*++
+
+Copyright (c) Microsoft Corporation.  All rights reserved.
+
+Module Name:
+
+    FxIoTargetSelf.hpp
+
+Abstract:
+
+    Encapsulation of the Self target to which FxRequest are sent to.
+    FxSelfTarget represents the client itself and is used to send IO to
+    itself.
+
+    Unlike the the local and remote targets, the IO sent to an Self IO
+    target is routed to the sender's own top level queues. A dedicated queue
+    may also be configured as the target for requests dispatched to the Self
+    Io targets.
+
+Author:
+
+
+
+Environment:
+
+    Both kernel and user mode
+
+Revision History:
+
+--*/
+
+#ifndef _FXIOTARGETSELF_H_
+#define _FXIOTARGETSELF_H_
+
+class FxIoTargetSelf : public FxIoTarget {
+
+public:
+
+    FxIoTargetSelf(
+        _In_ PFX_DRIVER_GLOBALS FxDriverGlobals,
+        _In_ USHORT ObjectSize
+        );
+
+    virtual
+    _Must_inspect_result_
+    MdDeviceObject
+    GetTargetDeviceObject(
+        _In_ CfxDeviceBase* Device
+        )
+    /*++
+    Routine Description:
+        Returns the target device object of the Device. In case of an Self
+        Io Target it is the device itself.
+
+    Arguments:
+
+        Device - Handle to the Device Object
+
+    Returns:
+
+        MdDeviceObject for the Device.
+
+    --*/
+    {
+        return Device->GetDeviceObject();
+    }
+
+    FxIoQueue*
+    GetDispatchQueue(
+        _In_ UCHAR MajorFunction
+        );
+
+    VOID
+    SetDispatchQueue(
+        _In_ FxIoQueue* DispatchQueue
+        )
+    /*++
+    Routine Description:
+        Sets a disapatch queue for the IO send to the Self IO Target.
+    --*/
+    {
+        ASSERT(m_DispatchQueue == NULL);
+        m_DispatchQueue =  DispatchQueue;
+    }
+
+    virtual
+    VOID
+    Send(
+        _In_ MdIrp Irp
+        );
+
+protected:
+    //
+    // Hide destructor since we are reference counted object
+    //
+    ~FxIoTargetSelf();
+
+private:
+
+    //
+    // A Queue configured to dispatch IO sent to the Self IO Target.
+    //
+    FxIoQueue* m_DispatchQueue;
+
+};
+
+#endif //_FXIOTARGETSELF_H_