CfL performs an extra loop iteration during luma mode selection. Recent
changes have broken the extra iteration. Remove previous approach.

New approach adds the extra iteration right before uv parameter
selection. Interesting fact, If the best luma intra mode already has
worse RD performance than the best inter mode found so far (if any),
then the entire chroma intra search is skipped, including the extra 
iteration.

Results on Subset1 (compared to 3e18e4ae with CfL)

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-0.3090 | -2.7271 | -2.3521 |  -0.3369 | -0.3463 | -0.3525 |    -1.1868

Change-Id: If67b0badd2c8ea25c61685483d39d622c1729b18