media: dvb: Fix PCR filter stop deleting PES analysis operation

Stopping a PCR filter while another decoder filter is set up on
the same PID causes the PES analysis operation to be removed.
However, this operation is still required for the decoder filter.

Change-Id: Ia7f12ef72ea20463fdc9fcf54b021c49c71c6758
Signed-off-by: Gilad Broner <gbroner@codeaurora.org>