As Pavel Machek has pointed out, the Kconfig entry for WMI is pretty
non-descriptive.
Rewrite it so that it explains what ACPI-WMI is, and why anyone
would want to enable it.
Many thanks to Ray Lee for ideas on this.
Signed-off-by: Carlos Corbacho <carlos@strangeworlds.co.uk> CC: Pavel Machek <pavel@ucw.cz> CC: Ray Lee <ray-lk@madrabbit.org> Signed-off-by: Len Brown <len.brown@intel.com>