HID: asus: Add support for ASUS ROG Z13 keyboard

Add support for the ROG Z13 keyboard. This is a variant of the last
few ASUS ROG keyboards and has much of the same functionality.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>