dvdlpcmdec: rewrite with GstAudioDecoder and add new format

Submitted by Michael Olbrich @mol

Link to original bug (#765807)

Description

There are multiple variations of LPCM. One for DVDs is already implemented in dvdlpcmdec.
Another is defined in the "DVD-Video/Audio through IEEE1394 Bus" spec (http://www.dvdforum.org/images/Guideline1394V10R0_20020911.pdf). This was also reused for Wifi-Display.
I have 3 Patches to support this:

1. Add support for the stream_type (0x83) in tsdemux
2. Convert dvdlpcmdec to use GstAudioDecoder
3. Add support for the format mentioned above.

See also

• Bug 703913