Get LAN mac from name of LAN card

lspci

02:00.0 Ethernet controller:
Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 09)

03:07.0 Ethernet controller:
Intel Corporation 82557/8/9/0/1 Ethernet Pro 100 (rev 0c)

cat /sys/bus/pci/devices/0000\:02\:00.0/net/enp2s0/address
74:d0:2b:c8:32:6e

cat /sys/bus/pci/devices/0000\:03\:07.0/net/enp3s7/address
00:02:b3:4b:35:a8