sysutils/smartmontools: unbreak in 12-CURRENT

Between __FreeBSD_version 1200058 and 1200081 fields opc and fuse of
struct nvme_command (sys/dev/nvme/nvme.h) where merged under opc_fuse, but
in r338182 this change was undone and this port broke.

Update patch to fix it so it works regardless of the revision we check out.

PR: 230867
Submitted by: ohartmann@walstatt.org
Approved by: tcberner (mentor), maintainer (timeout, 2 weeks)
Differential Revision: https://reviews.freebsd.org/D16908