media: dt-bindings: media: i2c: Add IMX219 CMOS sensor binding

Add YAML device tree binding for IMX219 CMOS image sensor, and
the relevant MAINTAINERS entries.

Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>