media: media/dvb-frontends: fix repeated words in comments

Delete the redundant word 'in'.

Link: https://lore.kernel.org/linux-media/20220724073242.15279-1-wangjianli@cdjrlc.com


Signed-off-by: wangjianli <wangjianli@cdjrlc.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>