drm/nouveau/nouveaubo: fix potential memory leak in nouveaubo_alloc()
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 v5.4.220 by commit 1d0803b1532de87ec2156ec7142275e6f390c032. For more details please see the references link.