thermal: amlogic: Make amlogic_thermal_disable() return void

amlogic_thermal_disable() returned zero unconditionally and
amlogic_thermal_remove() already ignores the return value.

Make it return no value and modify amlogic_thermal_suspend to not check
the value.

This patch introduces no semantic changes, but makes it more obvious for
a human reader that amlogic_thermal_suspend() cannot fail.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20231116112633.668826-2-u.kleine-koenig@pengutronix.de

drivers/thermal/amlogic_thermal.c

@@ -167,13 +167,11 @@ static int amlogic_thermal_enable(struct amlogic_thermal *data)
 	return 0;
 }
 
-static int amlogic_thermal_disable(struct amlogic_thermal *data)
+static void amlogic_thermal_disable(struct amlogic_thermal *data)
 {
 	regmap_update_bits(data->regmap, TSENSOR_CFG_REG1,
 			   TSENSOR_CFG_REG1_ENABLE, 0);
 	clk_disable_unprepare(data->clk);
-
-	return 0;
 }
 
 static int amlogic_thermal_get_temp(struct thermal_zone_device *tz, int *temp)
@@ -302,7 +300,9 @@ static int __maybe_unused amlogic_thermal_suspend(struct device *dev)
 {
 	struct amlogic_thermal *data = dev_get_drvdata(dev);
 
-	return amlogic_thermal_disable(data);
+	amlogic_thermal_disable(data);
+
+	return 0;
 }
 
 static int __maybe_unused amlogic_thermal_resume(struct device *dev)