eglfs: Don't update screen for non mouse-move events

Change-Id: I7df089a9dc87396e19c08cef3d76c7c7f95a8fbf
Reviewed-by: Donald Carr <donald.carr@nokia.com>
Reviewed-by: Andy Nichols <andy.nichols@nokia.com>
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

src/plugins/platforms/eglfs/qeglfscursor.cpp

@@ -235,6 +235,8 @@ void QEglFSCursor::setPos(const QPoint &pos)
 
 void QEglFSCursor::pointerEvent(const QMouseEvent &event)
 {
+    if (event.type() != QEvent::MouseMove)
+        return;
     const QRect oldCursorRect = cursorRect();
     m_pos = event.pos();
     QRegion rgn = oldCursorRect | cursorRect();