nfc: pn533: 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: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/pn533/i2c.c

@@ -264,7 +264,7 @@ static const struct of_device_id of_pn533_i2c_match[] = {
 };
 MODULE_DEVICE_TABLE(of, of_pn533_i2c_match);
 
-static struct i2c_device_id pn533_i2c_id_table[] = {
+static const struct i2c_device_id pn533_i2c_id_table[] = {
 	{ PN533_I2C_DRIVER_NAME, 0 },
 	{}
 };