On laptops such as Asus GL553VD, setting keyboard backlight levels
does not work. This change enables F3/F4 keys to set backlight levels
(from 0 to 3, total 4 levels) on such laptops.

It is intended only to the following device: 0x0b05 1854:

	P: Vendor=0b05 ProdID=1854 Rev=03.02
	S: Manufacturer=ITE Tech. Inc.
	S: Product=ITE Device(8910)

[jkosina@suse.cz: massage changelog a little bit]
Signed-off-by: Mustafa C Kuscu <mustafakuscu@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>