Allows the BCMA version of the bgmac driver to obtain MAC address
from the device tree.  If no MAC address is specified there, then
the previous behavior (obtaining MAC address from SPROM) is
used.
Signed-off-by: NSteve Lin <steven.lin1@broadcom.com>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Acked-by: NJon Mason <jon.mason@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>