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/qcam/format_converter.cpp

@@ -27,7 +27,7 @@
 #define CLIP(x)			CLAMP(x,0,255)
 #endif
 
-int FormatConverter::configure(unsigned int format, unsigned int width,
+int FormatConverter::configure(libcamera::PixelFormat format, unsigned int width,
 			       unsigned int height)
 {
 	switch (format) {