if_vlan: Remove VLAN_ETH_ALEN define and the 1 use of it

Just use ETH_ALEN.
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/if_vlan.h

@@ -18,10 +18,9 @@
 #include <linux/etherdevice.h>
 #include <linux/rtnetlink.h>
 
-#define VLAN_HLEN	4		/* The additional bytes (on top of the Ethernet header)
-					 * that VLAN requires.
+#define VLAN_HLEN	4		/* The additional bytes required by VLAN
+					 * (in addition to the Ethernet header)
 					 */
-#define VLAN_ETH_ALEN	6		/* Octets in one ethernet addr	 */
 #define VLAN_ETH_HLEN	18		/* Total octets in header.	 */
 #define VLAN_ETH_ZLEN	64		/* Min. octets in frame sans FCS */
 
@@ -177,7 +176,7 @@ static inline struct sk_buff *vlan_insert_tag(struct sk_buff *skb, u16 vlan_tci)
 	veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN);
 
 	/* Move the mac addresses to the beginning of the new header. */
-	memmove(skb->data, skb->data + VLAN_HLEN, 2 * VLAN_ETH_ALEN);
+	memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN);
 	skb->mac_header -= VLAN_HLEN;
 
 	/* first, the ethernet type */