CVE-2025-40011 drm/gma500: Fix null dereference in hdmi teardown

In the Linux kernel, the following vulnerability has been resolved: drm/gma500: Fix null dereference in hdmi teardown pcisetdrvdata sets the value of pdev-driverdata to NULL, after which the driverdata obtained from the same dev is dereferenced in oaktrailhdmii2cexit, and the i2cdev is extracted...