net: lapbether: add blank line after declarations

This patch fixes the checkpatch error about missing a blank line
after declarations.
Signed-off-by: NPeng Li <lipeng321@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/wan/lapbether.c

@@ -303,6 +303,7 @@ static void lapbeth_disconnected(struct net_device *dev, int reason)
 static int lapbeth_set_mac_address(struct net_device *dev, void *addr)
 {
 	struct sockaddr *sa = addr;
+
 	memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
 	return 0;
 }