Input: wistron_btns - mark the Medion MD96500 keymap as tested

DMI: MEDIONPC WIM 2040/WIM 2040, BIOS R01-A0O    11/04/2005
wistron_btns: BIOS signature found at c00f6b00, entry point 000FDD50
input: Wistron laptop buttons as /devices/platform/wistron-bios/input/input5

Signed-off-by: Stefan Lippers-Hollmann <s.l-h@gmx.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>