thermal/drivers/sun8i: Remove redundant msg in sun8i_ths_register()

The upper-layer devm_thermal_add_hwmon_sysfs() function can directly
print error information.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230620090732.50025-2-frank.li@vivo.com

Author: bbkzz

drivers/thermal/sun8i_thermal.c

@@ -468,9 +468,7 @@ static int sun8i_ths_register(struct ths_device *tmdev)
 		if (IS_ERR(tmdev->sensor[i].tzd))
 			return PTR_ERR(tmdev->sensor[i].tzd);
 
-		if (devm_thermal_add_hwmon_sysfs(tmdev->dev, tmdev->sensor[i].tzd))
-			dev_warn(tmdev->dev,
-				 "Failed to add hwmon sysfs attributes\n");
+		devm_thermal_add_hwmon_sysfs(tmdev->dev, tmdev->sensor[i].tzd);
 	}
 
 	return 0;