Kernel: Make major and minor numbers to be DistinctNumerics

This helps avoid confusion in general, and make constructors, methods
and code patterns much more clean and understandable.

Kernel/FileSystem/DeviceFileTypes.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Types.h>
+
+namespace Kernel {
+
+TYPEDEF_DISTINCT_ORDERED_ID(unsigned, MajorNumber);
+TYPEDEF_DISTINCT_ORDERED_ID(unsigned, MinorNumber);
+
+}