LibC+Kernel: Move GPU-related API methods to a LibC header file

The Kernel/API directory in general shouldn't include userspace code,
but structure definitions that both are shared between the Kernel and
userspace.

All users of the ioctl API obviously use LibC so LibC is the most common
and shared library for the affected programs.

Userland/Libraries/LibEDID/EDID.cpp

@@ -14,8 +14,8 @@
 #    include <Kernel/Library/StdLib.h>
 #else
 #    include <AK/ScopeGuard.h>
-#    include <Kernel/API/Graphics.h>
 #    include <fcntl.h>
+#    include <sys/devices/gpu.h>
 #    include <unistd.h>
 
 #    if ENABLE_PNP_IDS_DATA

Userland/Services/WindowServer/HardwareScreenBackend.cpp

@@ -8,10 +8,10 @@
 #include "HardwareScreenBackend.h"
 #include "ScreenBackend.h"
 #include <AK/Try.h>
-#include <Kernel/API/Graphics.h>
 #include <LibCore/System.h>
 #include <fcntl.h>
 #include <stdio.h>
+#include <sys/devices/gpu.h>
 #include <sys/mman.h>
 #include <unistd.h>
 

Userland/Services/WindowServer/Screen.cpp

@@ -14,10 +14,10 @@
 #include "WindowManager.h"
 #include <AK/Debug.h>
 #include <AK/Format.h>
-#include <Kernel/API/Graphics.h>
 #include <Kernel/API/MousePacket.h>
 #include <fcntl.h>
 #include <stdio.h>
+#include <sys/devices/gpu.h>
 #include <sys/mman.h>
 #include <unistd.h>
 

Userland/Services/WindowServer/ScreenLayout.ipp

@@ -5,7 +5,7 @@
  */
 
 #include <AK/ScopeGuard.h>
-#include <Kernel/API/Graphics.h>
+#include <sys/devices/gpu.h>
 #include <LibIPC/Decoder.h>
 #include <LibIPC/Encoder.h>
 #include <Services/WindowServer/ScreenLayout.h>

Userland/Services/WindowServer/main.cpp

@@ -9,7 +9,6 @@
 #include "EventLoop.h"
 #include "Screen.h"
 #include "WindowManager.h"
-#include <Kernel/API/Graphics.h>
 #include <LibCore/ConfigFile.h>
 #include <LibCore/DirIterator.h>
 #include <LibCore/System.h>
@@ -18,6 +17,7 @@
 #include <LibGfx/SystemTheme.h>
 #include <LibMain/Main.h>
 #include <signal.h>
+#include <sys/devices/gpu.h>
 
 namespace WindowServer {
 RefPtr<Core::ConfigFile> g_config;