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/ti/davinci_emac.c b/drivers/net/ethernet/ti/davinci_emac.c
index f053aeb..6d74cb7 100644
--- a/drivers/net/ethernet/ti/davinci_emac.c
+++ b/drivers/net/ethernet/ti/davinci_emac.c
@@ -1254,7 +1254,7 @@
 	struct sockaddr *sa = addr;
 
 	if (!is_valid_ether_addr(sa->sa_data))
-		return -EINVAL;
+		return -EADDRNOTAVAIL;
 
 	/* Store mac addr in priv and rx channel and set it in EMAC hw */
 	memcpy(priv->mac_addr, sa->sa_data, ndev->addr_len);