dvbtee: fix precompiler directives (change #if to #ifdef)

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
linuxtv_tuner: mark state as unlocked before a channel tune

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
hdhr_tuner: add basic pid filtering support, fix debug & state tracking

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>