bnad: remove duplicated #include

Remove duplicated #include('s) in
  drivers/net/bna/bnad.c

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

drivers/net/bna/bnad.c

@@ -25,7 +25,6 @@
 #include <linux/if_ether.h>
 #include <linux/ip.h>
 #include <linux/prefetch.h>
-#include <linux/if_vlan.h>
 
 #include "bnad.h"
 #include "bna.h"