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 v5.15.75 by commit 5ab84b1596b26a6c789e3075252df720b15fd126. For more details please see the references link.