Revert "Revert "tmpfiles.d: adjust /dev/vfio/vfio access mode""

This reverts commit 33b9130.

The commit b42482a dropped
'--exclude-prefix=/dev' from systemd-tmpfiles-setup.service. So, the
possibly later invocation of the service changes the permission set by
udevd.

As commmented in the head of this file, settings should be consistent
with udev rules. Only missing entry here is vfio. Let's re-add the
entry for the device.

Addresses systemd/systemd#28681 (comment).

(cherry picked from commit ca15b59)

Author: yuwata

tmpfiles.d/static-nodes-permissions.conf.in

@@ -14,6 +14,7 @@ z /dev/snd/timer    0660 - audio -
 z /dev/loop-control 0660 - disk  -
 z /dev/net/tun      0666 - -     -
 z /dev/fuse         0666 - -     -
+z /dev/vfio/vfio    0666 - -     -
 z /dev/kvm          {{DEV_KVM_MODE}} - kvm -
 z /dev/vhost-net    {{DEV_KVM_MODE}} - kvm -
 z /dev/vhost-vsock  {{DEV_KVM_MODE}} - kvm -