net: dpaa_eth: constify platform_device_id

platform_device_id are not supposed to change at runtime. All functions
working with platform_device_id provided by <linux/platform_device.h>
work with const platform_device_id. So mark the non-const structs as
const.
Signed-off-by: NArvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/dpaa/dpaa_eth.c

@@ -2830,7 +2830,7 @@ static int dpaa_remove(struct platform_device *pdev)
 	return err;
 }
 
-static struct platform_device_id dpaa_devtype[] = {
+static const struct platform_device_id dpaa_devtype[] = {
 	{
 		.name = "dpaa-ethernet",
 		.driver_data = 0,