HID: add support for Microsoft Wireless Laser Keyboard 6000

This keyboard emits a few usages that are not handled properly by
hid-input.

Changed IS_MS_NEK4K macro to IS_MS_KB to reflect the addition
of another keyboard.

Signed-off-by: Khelben Blackstaff <eye.of.the.8eholder@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>