net: fec: add defer probe for of_get_mac_address
If MAC address read from nvmem efuse by calling .of_get_mac_address(), but nvmem efuse is registered later than the driver, then it return -EPROBE_DEFER value. So modify the driver to support defer probe when read MAC address from nvmem efuse. Signed-off-by: Fugang Duan <fugang.duan@nxp.com> Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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