drm/i915/reset: Fix errorstateread ptr + offset use
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 v5.15.49 by commit f4c5eba87675a07a6c28cdaca7366aeb4258ec78, it was introduced in version v5.0 by commit 0e39037b3165567660b0e03f67534da5269a0465. For more details please see the references link.