libcamera: Use PixelFormat instead of unsigned int where appropriate

Use the PixelFormat instead of unsigned int where a pixel format is to
be used. PixelFormat is defined as an unsigned int but is about to be
turned into a class to add functionality.

There is no functional change in this patch.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/cam/main.cpp

@@ -303,7 +303,7 @@ int CamApp::infoConfiguration()
 		std::cout << index << ": " << cfg.toString() << std::endl;
 
 		const StreamFormats &formats = cfg.formats();
-		for (unsigned int pixelformat : formats.pixelformats()) {
+		for (PixelFormat pixelformat : formats.pixelformats()) {
 			std::cout << " * Pixelformat: 0x" << std::hex
 				  << std::setw(8) << pixelformat << " "
 				  << formats.range(pixelformat).toString()