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-palmas.c b/drivers/pinctrl/pinctrl-palmas.c
index 26461e3..2631df0 100644
--- a/drivers/pinctrl/pinctrl-palmas.c
+++ b/drivers/pinctrl/pinctrl-palmas.c
@@ -987,7 +987,7 @@
 	.num_pin_groups = ARRAY_SIZE(tps80036_pingroups),
 };
 
-static struct of_device_id palmas_pinctrl_of_match[] = {
+static const struct of_device_id palmas_pinctrl_of_match[] = {
 	{ .compatible = "ti,palmas-pinctrl", .data = &tps65913_pinctrl_data},
 	{ .compatible = "ti,tps65913-pinctrl", .data = &tps65913_pinctrl_data},
 	{ .compatible = "ti,tps80036-pinctrl", .data = &tps80036_pinctrl_data},