V4L/DVB (5398): Cpia_pp.c: don't use _WORK_NAR

pp_cam_entry->cb_task need not to be _NOAUTOREL ... because in fact it is
never used ???

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>