ACPI: ibm_acpi: Update documentation for brightness and volume.
ACPI: ibm_acpi: Update documentation for brightness and volume.

Document the change of the experimental flag for brightness and volume.

Signed-off-by: Stefan Schmidt <eb0877843acc39f8ef6f7269937dee931c372d23@datenfreihafen.org>
Acked-by: Borislav Deianov <8396df6052cbb7be3f6327a0a60303b5de5bdfa7@users.sourceforge.net>
Signed-off-by: Len Brown <b060cfa1096cc6e8be83699ddb4ed8a77dd63af5@intel.com>

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