via-velocity: remove duplicated #include

Remove duplicated #include('s) in
  drivers/net/via-velocity.c

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/via-velocity.c

@@ -77,7 +77,6 @@
 #include <linux/udp.h>
 #include <linux/crc-ccitt.h>
 #include <linux/crc32.h>
-#include <linux/if_vlan.h>
 
 #include "via-velocity.h"