Fix QScreen orientation not being updated when setting a platform screen

ScreenPrivate::updatePrimaryOrientation() depends on the geometry
being set which is calculated by updateHighDpi().
Move the call up.
Amends 370289bef68d8505b66cb27150a3f596e23c5ed3.

Task-number: QTBUG-76902
Change-Id: I8188e04ad4a2ef7d414a2b78ecb3dd6c64528fa6
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit d10c34b0cc896c711fce8ae5629e3cc3d74b6452)

src/gui/kernel/qscreen.cpp

@@ -118,8 +118,8 @@ void QScreenPrivate::setPlatformScreen(QPlatformScreen *screen)
     if (refreshRate < 1.0)
         refreshRate = 60.0;
 
-    updatePrimaryOrientation();
     updateHighDpi();
+    updatePrimaryOrientation(); // derived from the geometry
 }