V4L/DVB (4608a): V4L1 API conversion not finished yet

Updates feature-removal-schedule.txt to reflect the current scheduled date
to convert all V4L1 drivers to V4L2.
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

Documentation/feature-removal-schedule.txt

@@ -41,7 +41,7 @@ Who:	Stefan Richter <stefanr@s5r6.in-berlin.de>
 ---------------------------
 
 What:	Video4Linux API 1 ioctls and video_decoder.h from Video devices.
-When:	July 2006
+When:	December 2006
 Why:	V4L1 AP1 was replaced by V4L2 API. during migration from 2.4 to 2.6
 	series. The old API have lots of drawbacks and don't provide enough
 	means to work with all video and audio standards. The newer API is