Kernel/Graphics: Rename GraphicsDevice => GenericGraphicsAdapter

We already use the term adapter for instances of this class, so let's
better represent this class by changing its name to what it really is.

Kernel/Graphics/GenericGraphicsAdapter.h

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/String.h>
+#include <AK/Types.h>
+#include <Kernel/Bus/PCI/Definitions.h>
+#include <Kernel/Devices/BlockDevice.h>
+#include <Kernel/PhysicalAddress.h>
+
+namespace Kernel {
+class GenericGraphicsAdapter : public RefCounted<GenericGraphicsAdapter> {
+public:
+    virtual ~GenericGraphicsAdapter() = default;
+    virtual void initialize_framebuffer_devices() = 0;
+    virtual void enable_consoles() = 0;
+    virtual void disable_consoles() = 0;
+    bool consoles_enabled() const { return m_consoles_enabled; }
+    virtual bool framebuffer_devices_initialized() const = 0;
+
+    virtual bool modesetting_capable() const = 0;
+    virtual bool double_framebuffering_capable() const = 0;
+
+    virtual bool vga_compatible() const = 0;
+
+    virtual bool try_to_set_resolution(size_t output_port_index, size_t width, size_t height) = 0;
+    virtual bool set_y_offset(size_t output_port_index, size_t y) = 0;
+
+protected:
+    GenericGraphicsAdapter() = default;
+
+    bool m_consoles_enabled { false };
+};
+
+}