Do real chroma RDO search for CDEF

Chroma now has a list of strenghts too, with the superblock signalling
shared between luma and chroma.

low-latency, cpu=4:

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
-0.0114 | -1.4626 | -1.4745 |  -0.0423 | 0.0430 | -0.0001 |    -0.7416

Change-Id: I389c77f1d80020f810e45f8502c656ad9d397c8c
diff --git a/av1/encoder/bitstream.c b/av1/encoder/bitstream.c
index fdc7ac8..9252b00 100644
--- a/av1/encoder/bitstream.c
+++ b/av1/encoder/bitstream.c
@@ -3496,9 +3496,8 @@
   aom_wb_write_literal(wb, cm->cdef_bits, 2);
   for (i = 0; i < cm->nb_cdef_strengths; i++) {
     aom_wb_write_literal(wb, cm->cdef_strengths[i], CDEF_STRENGTH_BITS);
+    aom_wb_write_literal(wb, cm->cdef_uv_strengths[i], CDEF_STRENGTH_BITS);
   }
-  aom_wb_write_literal(wb, cm->clpf_strength_u, 2);
-  aom_wb_write_literal(wb, cm->clpf_strength_v, 2);
 }
 #endif