Enable cdef by default

high-latency, cpu-used=0:

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-2.0680 | -0.9789 | -0.7987 |  -0.7414 | -1.6257 | -0.8961 |    -2.0220

Low-latency, cpu-used=0:

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-3.9175 | -2.1697 | -2.5191 |  -2.4382 | -3.4157 | -2.5755 |    -3.6688

Low-latency, cpu-used=4:

   PSNR | PSNR Cb | PSNR Cr | PSNR HVS |    SSIM | MS SSIM | CIEDE 2000
-7.5800 | -4.3697 | -4.3494 |  -5.4149 | -7.8724 | -6.0894 |    -7.3975

Change-Id: Ib784ed088fa537cf47d87477954c2d5047b3c42c

configure

@@ -475,6 +475,7 @@ post_process_cmdline() {
     soft_enable delta_q
     soft_enable tile_groups
     soft_enable rect_tx
+    soft_enable cdef
 
     # Enable low-bitdepth pixel pipeline by default
     soft_enable lowbitdepth