ethernet: unify return value of .ndo_set_mac_address if address is invalid

Unify return value of .ndo_set_mac_address if the given address
isn't valid. Return -EADDRNOTAVAIL as eth_mac_addr() already does
if is_valid_ether_addr() fails.

Signed-off-by: Danny Kukawka <danny.kukawka@bisect.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/neterion/s2io.c b/drivers/net/ethernet/neterion/s2io.c
index 44a6065..22a8de0 100644
--- a/drivers/net/ethernet/neterion/s2io.c
+++ b/drivers/net/ethernet/neterion/s2io.c
@@ -5248,7 +5248,7 @@
 	struct sockaddr *addr = p;
 
 	if (!is_valid_ether_addr(addr->sa_data))
-		return -EINVAL;
+		return -EADDRNOTAVAIL;
 
 	memcpy(dev->dev_addr, addr->sa_data, dev->addr_len);