py: gen-py-formats.py: Open input file in binary mode

Other code generation scripts do that already and let pyyaml deal with
decoding utf-8, etc. So do the same here as well.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

src/py/libcamera/gen-py-formats.py

@@ -37,7 +37,7 @@ def main(argv):
                         help='Template file name.')
     args = parser.parse_args(argv[1:])
 
-    with open(args.input, encoding='utf-8') as f:
+    with open(args.input, 'rb') as f:
         formats = yaml.safe_load(f)['formats']
 
     data = generate(formats)