drm/i915/gvt: fix gvt debugfs destroy
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v5.15.87 by commit ae9a61511736cc71a99f01e8b7b90f6fb6128ed8, it was introduced in version v4.16 by commit bc7b0be316aebac42eb9e8e54c984609555944da. For more details please see the references link.