nvme-pci: fix mempool alloc size
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 v5.15.87 by commit 9141144b37f30e3e7fa024bcfa0a13011e546ba9, it was introduced in version v4.18 by commit 943e942e6266f22babee5efeb00f8f672fbff5bd. For more details please see the references link.