media: pci/cx23885: fix repeated words in comments

Delete the redundant word 'of'.

Signed-off-by: wangjianli <wangjianli@cdjrlc.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>