Kernel: Move all Graphics-related code into Devices/GPU directory

Like the HID, Audio and Storage subsystem, the Graphics subsystem (which
handles GPUs technically) exposes unix device files (typically in /dev).
To ensure consistency across the repository, move all related files to a
new directory under Kernel/Devices called "GPU".

Also remove the redundant "GPU" word from the VirtIO driver directory,
and the word "Graphics" from GraphicsManagement.{h,cpp} filenames.

Kernel/Devices/GPU/VMWare/Definitions.h

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Types.h>
+
+namespace Kernel {
+
+static constexpr size_t vmware_svga_version_2_id = (0x900000UL << 8 | (2));
+
+enum class VMWareDisplayRegistersOffset {
+    ID = 0,
+    ENABLE = 1,
+    WIDTH = 2,
+    HEIGHT = 3,
+    MAX_WIDTH = 4,
+    MAX_HEIGHT = 5,
+    DEPTH = 6,
+    BITS_PER_PIXEL = 7, /* Current bpp in the guest */
+    PSEUDOCOLOR = 8,
+    RED_MASK = 9,
+    GREEN_MASK = 10,
+    BLUE_MASK = 11,
+    BYTES_PER_LINE = 12,
+    FB_OFFSET = 14,
+    VRAM_SIZE = 15,
+    FB_SIZE = 16,
+
+    CAPABILITIES = 17,
+    MEM_SIZE = 19,
+    CONFIG_DONE = 20,  /* Set when memory area configured */
+    SYNC = 21,         /* See "FIFO Synchronization Registers" */
+    BUSY = 22,         /* See "FIFO Synchronization Registers" */
+    SCRATCH_SIZE = 29, /* Number of scratch registers */
+    MEM_REGS = 30,     /* Number of FIFO registers */
+    PITCHLOCK = 32,    /* Fixed pitch for all modes */
+    IRQMASK = 33,      /* Interrupt mask */
+
+    GMR_ID = 41,
+    GMR_DESCRIPTOR = 42,
+    GMR_MAX_IDS = 43,
+    GMR_MAX_DESCRIPTOR_LENGTH = 44,
+
+    TRACES = 45,         /* Enable trace-based updates even when FIFO is on */
+    GMRS_MAX_PAGES = 46, /* Maximum number of 4KB pages for all GMRs */
+    MEMORY_SIZE = 47,    /* Total dedicated device memory excluding FIFO */
+};
+
+struct [[gnu::packed]] VMWareDisplayFIFORegisters {
+    u32 start;
+    u32 size;
+    u32 next_command;
+    u32 stop;
+    u32 commands[];
+};
+
+}