EGL_NO_X11 has been replaced with USE_X11, thus breaking all existing
code out there, including Qt:
https://github.com/KhronosGroup/EGL-Registry/pull/130

Fix this by defining USE_X11 whenever we do not define EGL_NO_X11.

Fixes: QTBUG-96392
Pick-to: 6.2
Change-Id: If8b68caa8c9022477d87169ca2e2a0121a9313e0
Reviewed-by: default avatarAndy Nichols <andy.nichols@qt.io>
(cherry picked from commit 4cc54285)

https://invent.kde.org/qt/qt/qtbase/-/commit/7a44796c813ab9661a68d42a67c18759d0a3f9ed

Index: src/gui/configure.json
--- src/gui/configure.json.orig
+++ src/gui/configure.json
@@ -834,7 +834,8 @@
                     "// embedded devices, are not intended to be used together with X. EGL support",
                     "// has to be disabled in plugins like xcb in this case since the native display,",
                     "// window and pixmap types will be different than what an X-based platform",
-                    "// plugin would expect."
+                    "// plugin would expect.",
+                    "#define USE_X11"
                 ],
                 "include": [ "EGL/egl.h", "X11/Xlib.h" ],
                 "main": [