[media] cx231xx: drop condition with no effect

The if and the else code are identical - so the condition has no effect
on the effective code.
This patch removes the condition and the duplicated code.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>