thermal: armada: constify thermal_zone_of_device_ops structure

The thermal_zone_of_device_ops structure can be const as it is only
passed as the last argument of devm_thermal_zone_of_sensor_register
and the corresponding parameter is declared as const.

Done with the help of Coccinelle.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: NEduardo Valentin <edubezval@gmail.com>

drivers/thermal/armada_thermal.c

@@ -395,7 +395,7 @@ static int armada_get_temp(void *_sensor, int *temp)
 	return ret;
 }
 
-static struct thermal_zone_of_device_ops of_ops = {
+static const struct thermal_zone_of_device_ops of_ops = {
 	.get_temp = armada_get_temp,
 };