drm/drv: Fix potential memory leak in drm_dev_init()

drm/drv: Fix potential memory leak in drm_dev_init()

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 v5.10.156 by commit c47a823ea186263ab69cfb665327b7f72cb5e779, it was introduced in version v5.8 by commit 2cbf7fc6718b9443ecd6261308c6348d8ffcccae. For more details please see the references link.