libcamera: mali-c55: Fix sensor size computation

The last size in the list is always selected unconditionally because
the current best distance is not updated properly during the search.

Fix the size computation procedure which has an inverted assignment.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Tested-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/pipeline/mali-c55/mali-c55.cpp

@@ -661,7 +661,7 @@ CameraConfiguration::Status MaliC55CameraConfiguration::validate()
 				std::abs(static_cast<int>(minSensorSize.height) -
 					 static_cast<int>(size.height));
 		if (dist < distance) {
-			dist = distance;
+			distance = dist;
 			bestSize = size;
 		}
 	}