utils: raspberrypi: ctt: Fix pycodestyle E228

E228 missing whitespace around modulo operator

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>

utils/raspberrypi/ctt/ctt_awb.py

@@ -326,7 +326,7 @@ def get_alsc_patches(Img, colour_cals, grey=True):
     if img colour is below minimum or above maximum alsc calibration colour, simply
     pick extreme closest to img colour
     """
-    if pos%(len(cts)) == 0:
+    if pos % len(cts) == 0:
         """
         this works because -0 = 0 = first and -1 = last index
         """