sfc: remove duplicated include from efx.c

Remove duplicated include.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/sfc/efx.c

@@ -21,7 +21,6 @@
 #include <linux/ethtool.h>
 #include <linux/topology.h>
 #include <linux/gfp.h>
-#include <linux/pci.h>
 #include <linux/cpu_rmap.h>
 #include <linux/aer.h>
 #include "net_driver.h"