Commit a9885c8f ("HID: Zydacron Remote Control driver") added
hid-zydracon driver by Don Prince, but mistakenly omitted hid-zydracon.c
file itself. Properly add the file.
Reported-by: NDon Prince <dhprince.devel@yahoo.co.uk>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>