hwmon: (dell-smm) Add comment explaining usage of i8k_config_data[]

i8k_config_data[] should only be used for applying device specific
quirks in case autoconfig does not work properly on certain
devices.
Signed-off-by: NArmin Wolf <W_Armin@gmx.de>
Reviewed-by: NPali Rohár <pali@kernel.org>
Link: https://lore.kernel.org/r/20211021190531.17379-5-W_Armin@gmx.deSigned-off-by: NGuenter Roeck <linux@roeck-us.net>

drivers/hwmon/dell-smm-hwmon.c

@@ -996,6 +996,11 @@ enum i8k_configs {
 	DELL_XPS,
 };
 
+/*
+ * Only use for machines which need some special configuration
+ * in order to work correctly (e.g. if autoconfig fails on this machines).
+ */
+
 static const struct i8k_config_data i8k_config_data[] __initconst = {
 	[DELL_LATITUDE_D520] = {
 		.fan_mult = 1,