dix: unexport AddScreen() and AddGPUScreen()

These aren't used by any drivers/modules, just DDX'es, so no need to export.

Note: tigervnc does use it, but it has it's own DDX, therefore directly
linked in, just like the in-tree DDX'es which doesn't need exporting.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1349>

dix/dispatch.c

@@ -106,6 +106,9 @@ Equipment Corporation.
 #include "windowstr.h"
 #include <X11/fonts/fontstruct.h>
 #include <X11/fonts/libxfont2.h>
+
+#include "dix/screenint_priv.h"
+
 #include "dixfontstr.h"
 #include "dix_priv.h"
 #include "gcstruct.h"

dix/screenint_priv.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: MIT OR X11
+ *
+ * Copyright © 2024 Enrico Weigelt, metux IT consult <info@metux.net>
+ * Copyright © 1987, 1998 The Open Group
+ */
+#ifndef _XSERVER_DIX_SCREENINT_PRIV_H
+#define _XSERVER_DIX_SCREENINT_PRIV_H
+
+#include <X11/Xdefs.h>
+
+typedef struct _Screen *ScreenPtr;
+
+typedef Bool (*ScreenInitProcPtr)(ScreenPtr pScreen, int argc, char **argv);
+
+int AddScreen(ScreenInitProcPtr pfnInit, int argc, char **argv);
+int AddGPUScreen(ScreenInitProcPtr pfnInit, int argc, char **argv);
+
+#endif /* _XSERVER_DIX_SCREENINT_PRIV_H */

hw/kdrive/src/kdrive.c

@@ -23,6 +23,9 @@
 #ifdef HAVE_DIX_CONFIG_H
 #include <dix-config.h>
 #endif
+
+#include "dix/screenint_priv.h"
+
 #include "kdrive.h"
 #include <mivalidate.h>
 #include <dixstruct.h>

hw/vfb/InitOutput.c

@@ -37,6 +37,9 @@ from The Open Group.
 #include <X11/X.h>
 #include <X11/Xproto.h>
 #include <X11/Xos.h>
+
+#include "dix/screenint_priv.h"
+
 #include "scrnintstr.h"
 #include "servermd.h"
 #define PSZ 8

hw/xfree86/common/xf86Init.c

@@ -47,6 +47,9 @@
 #include <X11/Xmd.h>
 #include <X11/Xproto.h>
 #include <X11/Xatom.h>
+
+#include "dix/screenint_priv.h"
+
 #include "input.h"
 #include "servermd.h"
 #include "windowstr.h"

hw/xfree86/common/xf86platformBus.c

@@ -36,6 +36,9 @@
 #include <pciaccess.h>
 #include <fcntl.h>
 #include <unistd.h>
+
+#include "dix/screenint_priv.h"
+
 #include "os.h"
 #include "hotplug.h"
 #include "systemd-logind.h"

hw/xnest/Init.c

@@ -18,6 +18,9 @@ is" without express or implied warranty.
 
 #include <X11/X.h>
 #include <X11/Xproto.h>
+
+#include "dix/screenint_priv.h"
+
 #include "screenint.h"
 #include "input.h"
 #include "misc.h"

hw/xwayland/xwayland.c

@@ -33,6 +33,9 @@
 #include <errno.h>
 
 #include <X11/Xatom.h>
+
+#include "dix/screenint_priv.h"
+
 #include <selection.h>
 #include <micmap.h>
 #include <misyncshm.h>

hw/xwin/InitOutput.c

@@ -56,6 +56,8 @@ typedef WINAPI HRESULT(*SHGETFOLDERPATHPROC) (HWND hwndOwner,
                                               DWORD dwFlags, LPTSTR pszPath);
 #endif
 
+#include "dix/screenint_priv.h"
+
 #include "winmonitors.h"
 #include "nonsdk_extinit.h"
 #include "pseudoramiX/pseudoramiX.h"

include/screenint.h

@@ -54,10 +54,6 @@ typedef struct _Visual *VisualPtr;
 typedef struct _Depth *DepthPtr;
 typedef struct _Screen *ScreenPtr;
 
-typedef Bool (*ScreenInitProcPtr)(ScreenPtr pScreen, int argc, char **argv);
-extern _X_EXPORT int AddScreen(ScreenInitProcPtr pfnInit, int argc, char **argv);
-extern _X_EXPORT int AddGPUScreen(ScreenInitProcPtr pfnInit, int argc, char **argv);
-
 extern _X_EXPORT void RemoveGPUScreen(ScreenPtr pScreen);
 
 extern _X_EXPORT void