port-amd64/56694: Dell Latitude 5420 NVME driver not detected

[luisvmendes%yandex.com@localhost]

>Number:         56694
>Category:       port-amd64
>Synopsis:       Dell Latitude 5420 NVME driver not detected
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Feb 06 00:00:00 +0000 2022
>Originator:     Luis Mendes
>Release:        -current 9.99.93 (GENERIC)
>Organization:
>Environment:
NetBSD 9.99.93 NetBSD 9.99.93 (GENERIC) #0: Sun Jan 23 14:55:20 UTC 2022 mkrepro%mkrepro.NETbsd.org@localhost:/usr/src/sgs/arch/amd64/compile/GENERIC amd64
>Description:
For a Dell Latitude 5420 laptop, the M.2 256GB PCIe NVMe Class 35 Solid State Drive is not detected.

pcictl pci0 list  doesn't show it.

lspci in Linux shows:
- a RAID bus controller: Intel Corporation Volume Management device NVMe RAID Controller
- a 10000:e1:00.0  Non-Volatile memory controller: KIOXIA Corporation Device 
- a 10000:e0:1d.0 PCI bridge: Intel Corporation Tiger Lake-LP PCI Express Root Port #9 (rev 20)

In the IRC channel, mlelstv suggested that's probably a second PCI domain that is not supported.
>How-To-Repeat:
Just boot with the installation image.
>Fix: