libcamera: v4l2_subdevice: Add colorSpace field to V4L2SubdeviceFormat

This adds a ColorSpace field to the V4L2SubdeviceFormat so that we can
set and request particular color spaces from V4L2.

This commit simply adds the field and fixes some occurrences of brace
initializers that would otherwise be broken. A subsequent commit will
pass and retrieve the value correctly to/from V4l2 itself.

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/camera_sensor.cpp

@@ -642,6 +642,7 @@ V4L2SubdeviceFormat CameraSensor::getFormat(const std::vector<unsigned int> &mbu
 	V4L2SubdeviceFormat format{
 		.mbus_code = bestCode,
 		.size = *bestSize,
+		.colorSpace = ColorSpace::Raw,
 	};
 
 	return format;