sfc_ef100: remove duplicated include from ef100_netdev.c

Remove duplicated include.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/ef100_netdev.c

@@ -16,7 +16,6 @@
 #include "tx_common.h"
 #include "ef100_netdev.h"
 #include "ef100_ethtool.h"
-#include "efx_common.h"
 #include "nic_common.h"
 #include "ef100_nic.h"
 #include "ef100_tx.h"