media: MAINTAINERS: add entry for cxd2099

The cxd2099 driver is now maintained and being taken care of by

  * Jasmin Jessich <jasmin@anw.at>

Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>