net: core: constify mac addrs in selftests

Get it ready for constant netdev->dev_addr.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/selftests.c

@@ -15,8 +15,8 @@
 #include <net/udp.h>
 
 struct net_packet_attrs {
-	unsigned char *src;
-	unsigned char *dst;
+	const unsigned char *src;
+	const unsigned char *dst;
 	u32 ip_src;
 	u32 ip_dst;
 	bool tcp;
@@ -173,8 +173,8 @@ static int net_test_loopback_validate(struct sk_buff *skb,
 				      struct net_device *orig_ndev)
 {
 	struct net_test_priv *tpriv = pt->af_packet_priv;
-	unsigned char *src = tpriv->packet->src;
-	unsigned char *dst = tpriv->packet->dst;
+	const unsigned char *src = tpriv->packet->src;
+	const unsigned char *dst = tpriv->packet->dst;
 	struct netsfhdr *shdr;
 	struct ethhdr *ehdr;
 	struct udphdr *uhdr;