HID: replace BUG_ON() with WARN_ON()

There is no need to kill the system entirely in HID with BUG_ON,
use WARN_ON to handle fault more gracefully which allow the system
to keep running.

Signed-off-by: He Lugang <helugang@uniontech.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>