net: ethernet: dm9000: Handle -EPROBE_DEFER in dm9000_parse_dt()
The call to of_get_mac_address() can return -EPROBE_DEFER, for instance when the MAC address is read from a NVMEM driver that did not probe yet. Cc: H. Nikolaus Schaller <hns@goldelico.com> Cc: Mathieu Malaterre <malat@debian.org> Signed-off-by: Paul Cercueil <paul@crapouillou.net> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
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