* Fix non working cdfs kernel modul for >3.8 kernels

On Xtrend boxes with 3.8.7 kernel playback of audio cds wasn't possible.
"cdfs: Unknown symbol kernel_thread (err 0)" errors were shown in the log.
[dreambox] update drivers 01.10.2013
* Add a proper fix for DTS Passthrough

Using my previous patch we were getting the following error

(gst-launch-0.10:811): GStreamer-CRITICAL **: gst_caps_remove_structure: assertion `IS_WRITABLE (caps)' failed
(gst-launch-0.10:811): GStreamer-CRITICAL **: gst_caps_remove_structure: assertion `IS_WRITABLE (caps)' failed

Because we forget to make caps writable.

> -             caps = gst_static_caps_get(&hwtemplate->static_caps);
> +             caps = gst_caps_copy(&hwtemplate->static_caps.caps);