utils: raspberrypi: ctt: Fix pycodestyle E302

E302 expected 2 blank lines, found 0

Note that issues are still flagged, due to the use of docstrings as
multi-lines comments. This will be addressed separately.

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_macbeth_locator.py

@@ -13,6 +13,7 @@ NOTE: some custom functions have been used here to make the code more readable.
 These are defined in tools.py if they are needed for reference.
 """
 
+
 """
 Some inconsistencies between packages cause runtime warnings when running
 the clustering algorithm. This catches these warnings so they don't flood the
@@ -291,6 +292,7 @@ def find_macbeth(Cam, img, mac_config=(0, 0)):
 
     return(coords_fit)
 
+
 def get_macbeth_chart(img, ref_data):
     """
     function returns coordinates of macbeth chart vertices and square centres,