net: ixp46x: Remove duplicate include of module.h

Remove repeated include of linux/module.h as it has been included
at line 8.
Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/xscale/ptp_ixp46x.c

@@ -16,7 +16,6 @@
 #include <linux/ptp_clock_kernel.h>
 #include <linux/platform_device.h>
 #include <linux/soc/ixp4xx/cpu.h>
-#include <linux/module.h>
 #include <mach/ixp4xx-regs.h>
 
 #include "ixp46x_ts.h"