net: ti: cpsw:: 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/ti/cpsw.c

@@ -2827,7 +2827,7 @@ static int cpsw_probe_dual_emac(struct cpsw_priv *priv)
 
 #define CPSW_QUIRK_IRQ		BIT(0)
 
-static struct platform_device_id cpsw_devtype[] = {
+static const struct platform_device_id cpsw_devtype[] = {
 	{
 		/* keep it for existing comaptibles */
 		.name = "cpsw",