net: smsc911x: allow platform_data to specify mac address

Extend the driver to accept a MAC address specified in platform_data.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/smsc911x.h b/include/linux/smsc911x.h
index 5241e4f..7144e8a 100644
--- a/include/linux/smsc911x.h
+++ b/include/linux/smsc911x.h
@@ -30,6 +30,7 @@
 	unsigned int irq_type;
 	unsigned int flags;
 	phy_interface_t phy_interface;
+	unsigned char mac[6];
 };
 
 /* Constants for platform_device irq polarity configuration */