Fix build with -no-feature-gestures

Disable xcb touchpad gesture when gestures is not available

Pick-to: 6.5
Change-Id: Idd2fec38646fad4cbda20ab1e560949c8e8844ff
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

src/plugins/platforms/xcb/qxcbconnection_xi2.cpp

@@ -15,7 +15,9 @@
 
 #include <xcb/xinput.h>
 
+#if QT_CONFIG(gestures)
 #define QT_XCB_HAS_TOUCHPAD_GESTURES (XCB_INPUT_MINOR_VERSION >= 4)
+#endif
 
 using namespace Qt::StringLiterals;