add gmac0 read mac form eeprom,pcie30x1

hc

2023-11-22 d0a428a6556ea5a006e22e28b0b1cd037885fe20

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# network_device shelf slot file/disk/partition mac[,mac[,mac]]
#eth0 0 0 /dev/sdb 00:11:22:33:44:55