libcamera: camera_sensor: Transform CameraSensor::sizes()

In CameraSensor, the mbusCodes() and sizes() accessor functions
retrieves all the supported media bus codes and the supported sizes
respectively. However, this is quite limiting since the caller
probably isn't in a position to match which range of sizes are
supported for a particular mbusCode.

Hence, the caller is most likely interested to know about the sizes
supported for a particular media bus code. This patch transforms the
existing CameraSensor::sizes() to CameraSensor::sizes(mbuscode) to
achieve that goal.

The patch also transforms existing CIO2Device::sizes() in IPU3 pipeline
handler to CIO2Device::sizes(PixelFormat) on a similar principle. The
function is then plumbed to CameraSensor::sizes(mbusCode) to enumerate
the per-format sizes as required in
PipelineHandlerIPU3::generateConfiguration().

Signed-off-by: Umang Jain <umang.jain@ideasonboard.com>
Tested-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

test/camera-sensor.cpp

@@ -76,7 +76,7 @@ protected:
 			return TestFail;
 		}
 
-		const std::vector<Size> &sizes = sensor_->sizes();
+		const std::vector<Size> &sizes = sensor_->sizes(*iter);
 		auto iter2 = std::find(sizes.begin(), sizes.end(),
 				       Size(4096, 2160));
 		if (iter2 == sizes.end()) {