drm/i915/gt: Cleanup partial engine discovery failures

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GSD-2023-1001716 drm/i915/gt: Cleanup partial engine discovery failures

drm/i915/gt: Cleanup partial engine discovery failures 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 v6.1.7 by commit...