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_image_load.py

@@ -210,6 +210,7 @@ class Image:
         self.patches = all_patches
         return 1
 
+
 def brcm_load_image(Cam, im_str):
     """
     Load image where raw data and metadata is in the BRCM format
@@ -290,6 +291,7 @@ def brcm_load_image(Cam, im_str):
 
     return Img
 
+
 def dng_load_image(Cam, im_str):
     try:
         Img = Image(None)