mfd: tps65910: Make of_device_id array const

Make of_device_id array const, because all OF functions
handle it as const.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/tps65910.c b/drivers/mfd/tps65910.c
index 460a014..f9e42ea 100644
--- a/drivers/mfd/tps65910.c
+++ b/drivers/mfd/tps65910.c
@@ -379,7 +379,7 @@
 }
 
 #ifdef CONFIG_OF
-static struct of_device_id tps65910_of_match[] = {
+static const struct of_device_id tps65910_of_match[] = {
 	{ .compatible = "ti,tps65910", .data = (void *)TPS65910},
 	{ .compatible = "ti,tps65911", .data = (void *)TPS65911},
 	{ },