asus-laptop: fix input keycode

KEY_STOP is now KEY_STOPCD
 It's the correct key to stop a media
BTN_EXTRA is now KEY_SCREENLOCK:
 The laptop manual tells us that this key is for screenlock
KEY_TV is now KEY_PROG1
 So it can be reported to X server

Ref: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/361505



Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>