[media] s2255drv: checkpatch fix: coding style fix

Fixes all style warnings from scripts/checkpatch -f
Signed-off-by: NDean Anderson <linux-dev@sensoray.com>
Signed-off-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>