net: skb cleanup

Can remove anonymous union now it has one field.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/linux/skbuff.h

@@ -322,9 +322,7 @@ struct sk_buff {
 	ktime_t			tstamp;
 	struct net_device	*dev;
 
-	union {
-		unsigned long		_skb_dst;
-	};
+	unsigned long		_skb_dst;
 #ifdef CONFIG_XFRM
 	struct	sec_path	*sp;
 #endif