media: dt-bindings: samsung,fimc: correct unit addresses in DTS example

The camera node's ranges property and unit addresses of its children
were not correct.  If camera is @11800000, then its fimc child is @0.

Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>