The dc_pred values stored in the CfL context are in Q8.7 (Worst case
division will be of 1/128).

Results on Subset1 (compared to f9684d222 with CfL enabled)

  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0118 | -0.0181 | -0.0109 |   0.0086 | 0.0086 |  0.0196 |     0.0018

Change-Id: I0701e04fb76f03eff12ed01fd5fda675fbb15e32