pinctrl: constify of_device_id array

of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Acked-by: Hongzhou Yang <hongzhou.yang@mediatek.com>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index 6cfe534..087f994 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -1114,7 +1114,7 @@
 	return 0;
 }
 
-static struct of_device_id at91_pinctrl_of_match[] = {
+static const struct of_device_id at91_pinctrl_of_match[] = {
 	{ .compatible = "atmel,sama5d3-pinctrl", .data = &sama5d3_ops },
 	{ .compatible = "atmel,at91sam9x5-pinctrl", .data = &at91sam9x5_ops },
 	{ .compatible = "atmel,at91rm9200-pinctrl", .data = &at91rm9200_ops },
@@ -1693,7 +1693,7 @@
 	.ngpio			= MAX_NB_GPIO_PER_BANK,
 };
 
-static struct of_device_id at91_gpio_of_match[] = {
+static const struct of_device_id at91_gpio_of_match[] = {
 	{ .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, },
 	{ .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops },
 	{ /* sentinel */ }