Update device.coffee

The desire to write less code is commendable, but unfortunately, sometimes result in wrong JS.

```coffeescript
_find 'blackberry' or _find 'bb10' or _find 'rim'
# _find('blackberry' || _find('bb10' || _find('rim')));

_find('blackberry') or _find('bb10') or _find('rim')
# _find('blackberry') || _find('bb10') || _find('rim');
```