hwmon: (asus_atk0110) Fix compiler warning

atk_sensor_type is only used when DEBUG is defined.

Signed-off-by: Luca Tettamanti <[e-mail]>
Signed-off-by: Jean Delvare <[e-mail]>

drivers/hwmon/asus_atk0110.c

···
 	return 0;
 }
 
+#ifdef DEBUG
 static char const *atk_sensor_type(union acpi_object *flags)
 {
 	u64 type = flags->integer.value & ATK_TYPE_MASK;
···
 
 	return what;
 }
+#endif
 
 static void atk_print_sensor(struct atk_data *data, union acpi_object *obj)
 {