Bluetooth: hciuart: add missing NULL check in h5enqueue
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 v5.17.2 by commit 8a3896c30f542439d36303183dc96f65df8cc528, it was introduced in version v5.15 by commit d9dd833cf6d29695682ec7e7924c0d0992b906bc. For more details please see the references link.