Input: make i2c device ids constant

The id_table field of the struct i2c_driver is defined as constant
in <linux/i2c.h> so it makes sense to mark the initialization data also
constant.
Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/keyboard/qt2160.c

@@ -362,7 +362,7 @@ static int __devexit qt2160_remove(struct i2c_client *client)
 	return 0;
 }
 
-static struct i2c_device_id qt2160_idtable[] = {
+static const struct i2c_device_id qt2160_idtable[] = {
 	{ "qt2160", 0, },
 	{ }
 };

drivers/input/misc/apanel.c

@@ -149,7 +149,7 @@ static void apanel_shutdown(struct i2c_client *client)
 	apanel_remove(client);
 }
 
-static struct i2c_device_id apanel_id[] = {
+static const struct i2c_device_id apanel_id[] = {
 	{ "fujitsu_apanel", 0 },
 	{ }
 };

drivers/input/touchscreen/tsc2007.c

@@ -358,7 +358,7 @@ static int __devexit tsc2007_remove(struct i2c_client *client)
 	return 0;
 }
 
-static struct i2c_device_id tsc2007_idtable[] = {
+static const struct i2c_device_id tsc2007_idtable[] = {
 	{ "tsc2007", 0 },
 	{ }
 };