CRISv10 Ethernet declare mac fix

Declare mac using DECLARE_MAC_BUF for use when calling print_mac().

This fixes compile error where mac was undeclared.
Also, remove unused variable i.

Signed-off-by: Jesper Nilsson <[e-mail]>
Cc: Mikael Starvik <[e-mail]>
Cc: Jeff Garzik <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/net/cris/eth_v10.c

···
 {
 	struct net_local *np = netdev_priv(dev);
 	struct sockaddr *addr = p;
-	int i;
+	DECLARE_MAC_BUF(mac);
 
 	spin_lock(&np->lock); /* preemption protection */