ACPI: WMI: Improve Kconfig description
ACPI: WMI: Improve Kconfig description

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 <ab5e2bca84933118bbc9d48ffaccce3bac4eeb64@strangeworlds.co.uk>
CC: Pavel Machek <2375fa63e2908bb2df59f606483a3aa92321db7a@ucw.cz>
CC: Ray Lee <1f4b35b740cd4aa185baab339c585446c45cace2@madrabbit.org>
Signed-off-by: Len Brown <b060cfa1096cc6e8be83699ddb4ed8a77dd63af5@intel.com>

KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs