Description of problem:

It system has link in down state, pifconfig fails with `** ERROR ** [Device *]: [Errno 99] Cannot assign requested address`

Version-Release number of selected component (if applicable):
python3-ethtool-0.14-9.fc34

How reproducible:
always

Steps to Reproduce:
1. System with (multiple) NIC, one of them in DOWN state
2. pifconfig

Actual results:
lo
	inet addr:127.0.0.1
	Mask:255.0.0.0
	inet6 addr: ::1/128 Scope: host
	UP LOOPBACK RUNNING

enP2p1s0
	HWaddr *****
	inet addr:*****
	Bcast:*****
	Mask:255.255.224.0
	inet6 addr: ***** Scope: global
	inet6 addr: ***** Scope: link
	UP BROADCAST RUNNING MULTICAST

** ERROR ** [Device enp1s0f0np0]: [Errno 99] Cannot assign requested address

Expected results:
No error

Additional info:
`ip a` says
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enP2p1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether *****
    inet ***** brd ***** scope global dynamic noprefixroute enP2p1s0
       valid_lft 82653sec preferred_lft 82653sec
    inet6 ***** scope global dynamic noprefixroute 
       valid_lft 2591981sec preferred_lft 604781sec
    inet6 ***** scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: enp1s0f0np0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether *****
4: enp1s0f1np1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
    link/ether *****