media: saa7127: constify i2c_device_id

i2c_device_id are not supposed to change at runtime. All functions
working with i2c_device_id provided by <linux/i2c.h> work with
const i2c_device_id. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/i2c/saa7127.c

@@ -806,7 +806,7 @@ static int saa7127_remove(struct i2c_client *client)
 
 /* ----------------------------------------------------------------------- */
 
-static struct i2c_device_id saa7127_id[] = {
+static const struct i2c_device_id saa7127_id[] = {
 	{ "saa7127_auto", 0 },	/* auto-detection */
 	{ "saa7126", SAA7127 },
 	{ "saa7127", SAA7127 },