[media] MAINTAINERS: fix drivers/media/i2c/cx2341x.c

This file was moved to drivers/media/common/ by commit 62595820 ([media]
cx2341x: move from media/i2c to media/common).

Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>