ACPI / thermal: remove const from thermal_zone_device_ops declaration

The following commit introduced the requirement to not declare
thermal_zone_device_ops structs as const in order to allow
changing the .get_temp callback.

commit 4e5e4705
Author: Eduardo Valentin <eduardo.valentin@ti.com>
Date:   Wed Jul 3 15:35:39 2013 -0400

    thermal: introduce device tree parser

Modify acpi_thermal_zone_ops to follow the new requirement.
Signed-off-by: NEmil Goode <emilgoode@gmail.com>
Acked-by: NEduardo Valentin <eduardo.valentin@ti.com>
[rjw: Changelog]
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/thermal.c

@@ -862,7 +862,7 @@ acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal,
 	return acpi_thermal_cooling_device_cb(thermal, cdev, false);
 }
 
-static const struct thermal_zone_device_ops acpi_thermal_zone_ops = {
+static struct thermal_zone_device_ops acpi_thermal_zone_ops = {
 	.bind = acpi_thermal_bind_cooling_device,
 	.unbind	= acpi_thermal_unbind_cooling_device,
 	.get_temp = thermal_get_temp,