ata: constify of_device_id structures

Declare of_device_id structures as const as they are either passed to
the macro MODULE_DEVICE_TABLE or stored in the of_match_table field of a
device_driver structure. This field is of type const, so of_device_id
structures having this property can be made const too.

Cross compiled the files drivers/ata/pata_macio.c and
drivers/ata/pata_mpc52xx.c for powerpc architecture.

Signed-off-by: Bhumika Goyal <[e-mail]>
Signed-off-by: Tejun Heo <[e-mail]>

drivers/ata/pata_macio.c

···
 }
 #endif /* CONFIG_PM_SLEEP */
 
-static struct of_device_id pata_macio_match[] =
+static const struct of_device_id pata_macio_match[] =
 {
 	{
 	.name 		= "IDE",

drivers/ata/pata_mpc52xx.c

···
 }
 #endif
 
-static struct of_device_id mpc52xx_ata_of_match[] = {
+static const struct of_device_id mpc52xx_ata_of_match[] = {
 	{ .compatible = "fsl,mpc5200-ata", },
 	{ .compatible = "mpc5200-ata", },
 	{},

drivers/ata/pata_of_platform.c

···
 				     reg_shift, pio_mask, &pata_platform_sht);
 }
 
-static struct of_device_id pata_of_platform_match[] = {
+static const struct of_device_id pata_of_platform_match[] = {
 	{ .compatible = "ata-generic", },
 	{ },
 };

drivers/ata/sata_fsl.c

···
 }
 #endif
 
-static struct of_device_id fsl_sata_match[] = {
+static const struct of_device_id fsl_sata_match[] = {
 	{
 		.compatible = "fsl,pq-sata",
 	},

drivers/ata/sata_mv.c

···
 #endif
 
 #ifdef CONFIG_OF
-static struct of_device_id mv_sata_dt_ids[] = {
+static const struct of_device_id mv_sata_dt_ids[] = {
 	{ .compatible = "marvell,armada-370-sata", },
 	{ .compatible = "marvell,orion-sata", },
 	{},