media: MAINTAINERS: rectify CHRONTEL CH7322 CEC DRIVER section

Commit 7f52faab ("media: dt-bindings: Add ch7322 media i2c device")
slipped in a typo in the CHRONTEL CH7322 CEC DRIVER section.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains:

    warning: no file matches    F: \
        Documentation/devicetree/bindings/media/i2c/chontel,ch7322.yaml

Fix the typo to address this warning.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>