V4L: pvrusb2: Fix video corruption on stream start

V4L: pvrusb2: Fix video corruption on stream start

This introduces some extra cx23416 commands when streaming is
started.  The addition of these commands fix random sporadic video
corruption that can take place when the video stream is temporarily
disrupted through loss of signal (e.g. changing the channel in the RF
tuner).

This fix is already in the upstream driver source and has proven
itself there; this is a backport for the 2.6.20.y kernel series.

(backported from commit 6fe7d2c4660174110c6872cacc4fc2acb6e00acf)

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>