V4L/DVB (5820): Cleanup on cinergyT2: Remove unneeded if(1)

Before kernel 2.6.14, the driver checked for status before stopping the
thread. So, a compatibility test did exist. After 2.6.14, the
        if (state)
were replaced by:
        if (1)
However, it makes no sense to keep the if(1).

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>