[WDF] Add Windows Driver Framework files

Takern from Microsoft GitHub repo:
d9c6040fe9

Licensed under MIT

sdk/lib/drivers/wdf/shared/inc/primitives/common/mxtimer.h

@@ -0,0 +1,95 @@
+/*++
+
+Copyright (c) Microsoft Corporation
+
+ModuleName:
+
+    MxTimer.h
+
+Abstract:
+
+    Mode agnostic definiton of timer
+
+    See MxTimerKm.h and MxTimerUm.h for
+    mode specific implementations
+
+Author:
+
+
+Revision History:
+
+
+
+--*/
+
+#pragma once
+
+class MxTimer
+{
+private:
+    //
+    // Handle to the timer object
+    //
+    MdTimer m_Timer;
+
+public:
+
+    __inline
+    MxTimer(
+        VOID
+        );
+
+    __inline
+    ~MxTimer(
+        VOID
+        );
+
+    CHECK_RETURN_IF_USER_MODE
+    __inline
+    NTSTATUS
+    Initialize(
+        __in_opt PVOID TimerContext,
+        __in MdDeferredRoutine TimerCallback,
+        __in LONG Period
+        );
+
+    CHECK_RETURN_IF_USER_MODE
+    __inline
+    NTSTATUS
+    InitializeEx(
+        __in_opt PVOID TimerContext,
+        __in MdExtCallbackType TimerCallback,
+        __in LONG Period,
+        __in ULONG TolerableDelay,
+        __in BOOLEAN UseHighResolutionTimer
+        );
+
+    __inline
+    VOID
+    Start(
+        __in LARGE_INTEGER DueTime,
+        __in ULONG TolerableDelay = 0
+        );
+
+    __inline
+    BOOLEAN
+    StartWithReturn(
+        __in LARGE_INTEGER DueTime,
+        __in ULONG TolerableDelay = 0
+        );
+
+    _Must_inspect_result_
+    __inline
+    BOOLEAN
+    Stop(
+        VOID
+        );
+
+    __inline
+    VOID
+    FlushQueuedDpcs(
+        VOID
+        );
+};
+
+