hwmon: (dell-smm) rewrite CONFIG_I8K description

It is not the laptops, but the /proc/i8k interface that is legacy (or so
I think was the intention of the help text author). The old description
was confusing, fix this.

The phrase "Say Y if you intend to run this kernel on old Dell laptops
or want to use userspace package i8kutils." was introduced in 2015, in
commit 039ae585 ("hwmon: Allow to compile dell-smm-hwmon driver without /proc/i8k")

I think that "old laptops" was about hotkey and Fn key support - this
driver in the 2.4 kernels' era apparently had these capabilities
(see: https://github.com/vitorafsr/i8kutils , description of
"repeat_rate" kernel module parameter).
Signed-off-by: Mateusz Jończyk <mat.jonczyk@o2.pl>
Cc: Pali Rohár <pali@kernel.org>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Mark Gross <markgross@kernel.org>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20220212125654.357408-2-mat.jonczyk@o2.plSigned-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/Kconfig

@@ -507,19 +507,18 @@ config SENSORS_DELL_SMM
 	  userspace interface for i8kutils package.
 
 config I8K
-	bool "Dell i8k legacy laptop support"
+	bool "Legacy /proc/i8k interface of Dell laptop SMM BIOS hwmon driver"
 	depends on SENSORS_DELL_SMM
 	depends on PROC_FS
 	help
-	  This option enables legacy /proc/i8k userspace interface in hwmon
-	  dell-smm-hwmon driver. Character file /proc/i8k reports bios version,
-	  temperature and allows controlling fan speeds of Dell laptops via
-	  System Management Mode. For old Dell laptops (like Dell Inspiron 8000)
-	  it reports also power and hotkey status. For fan speed control is
-	  needed userspace package i8kutils.
+	  This option enables the legacy /proc/i8k userspace interface of the
+	  dell-smm-hwmon driver. The character file /proc/i8k exposes the BIOS
+	  version, temperatures and allows control of fan speeds of some Dell
+	  laptops. Sometimes it also reports power and hotkey status.
 
-	  Say Y if you intend to run this kernel on old Dell laptops or want to
-	  use userspace package i8kutils.
+	  This interface is required to run programs from the i8kutils package.
+
+	  Say Y if you intend to run userspace programs that use this interface.
 	  Say N otherwise.
 
 config SENSORS_DA9052_ADC