media: dvb: add support for extradata handling and trickmode play

The extradata handling support is added for extradata types.
Trickmode play support is also added for fast forward, and rewind.
The smooth trick mode playback is supported too.

Change-Id: I8535c1e1c831e31b8c3aab73f9806e5639e9b9be
Signed-off-by: Haifeng Xu <haifeng@codeaurora.org>