commit 5e7e9e90 upstream.

Based on code for the US Surface Type Cover 3
from commit be3b1634
("HID: add support for MS Surface Pro 3 Type Cover"):
Signed-off-by: Alan Wu <alan.c.wu@gmail.com>
Tested-by: Karlis Dreizis <karlisdreizis@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>