pi 4 unique matching interface for eth0

[Darrell J]

##fresh installation of ubuntu server 20.10 32-bit and 64-bit versions (both) will apply the netplan with no issue. However, after updating they show this error when trying to apply or try the netplan. this occurs on the Pi 4 2gb and 8gb model

# netplan try
Warning: Stopping systemd-networkd.service, but it can still be activated by:
  systemd-networkd.socket
[]
Cannot find unique matching interface for eth0: {'driver': 'bcmgenet smsc95xx lan78xx'}
Do you want to keep these settings?

Press ENTER before the timeout to accept the new configuration

##lspci data for the Broadcom adapter

# lspci -v
00:00.0 PCI bridge: Broadcom Inc. and subsidiaries Device 2711 (rev 10) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0, IRQ 55
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
        I/O behind bridge: 00000000-00000fff [size=4K]
        Memory behind bridge: f8000000-f80fffff [size=1M]
        Prefetchable memory behind bridge: [disabled]
        Capabilities: [48] Power Management version 3
        Capabilities: [ac] Express Root Port (Slot-), MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [180] Vendor Specific Information: ID=0000 Rev=0 Len=028 < ?>
        Capabilities: [240] L1 PM Substates
        Kernel driver in use: pcieport

01:00.0 USB controller: VIA Technologies, Inc. VL805 USB 3.0 Host Controller (re v 01) (prog-if 30 [XHCI])
        Subsystem: VIA Technologies, Inc. VL805 USB 3.0 Host Controller
        Flags: bus master, fast devsel, latency 0, IRQ 56
        Memory at 600000000 (64-bit, non-prefetchable) [size=4K]
        Capabilities: [80] Power Management version 3
        Capabilities: [90] MSI: Enable+ Count=1/4 Maskable- 64bit+
        Capabilities: [c4] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Kernel driver in use: xhci_hcd
        Kernel modules: xhci_pci

[Lukas Märdian (slyon)]

This is being worked on here: https://github.com/canonical/netplan/pull/202