[CFL] Get subsampling from AV1 common

This change does not impact the bitstream
  PSNR | PSNR Cb | PSNR Cr | PSNR HVS |   SSIM | MS SSIM | CIEDE 2000
0.0000 |  0.0000 |  0.0000 |   0.0000 | 0.0000 |  0.0000 |     0.0000

Change-Id: I6e131e91bad5efa345ed2542ae970eb6122eff51

av1/common/cfl.c

diff --git a/av1/common/cfl.c b/av1/common/cfl.c
index 749a535..061bae0 100644
--- a/av1/common/cfl.c
+++ b/av1/common/cfl.c
@@ -15,16 +15,15 @@
 
 #include "aom/internal/aom_codec_internal.h"
 
-void cfl_init(CFL_CTX *cfl, AV1_COMMON *cm, int subsampling_x,
-              int subsampling_y) {
-  if (!((subsampling_x == 0 && subsampling_y == 0) ||
-        (subsampling_x == 1 && subsampling_y == 1))) {
+void cfl_init(CFL_CTX *cfl, AV1_COMMON *cm) {
+  if (!((cm->subsampling_x == 0 && cm->subsampling_y == 0) ||
+        (cm->subsampling_x == 1 && cm->subsampling_y == 1))) {
     aom_internal_error(&cm->error, AOM_CODEC_UNSUP_BITSTREAM,
                        "Only 4:4:4 and 4:2:0 are currently supported by CfL");
   }
   memset(&cfl->y_pix, 0, sizeof(uint8_t) * MAX_SB_SQUARE);
-  cfl->subsampling_x = subsampling_x;
-  cfl->subsampling_y = subsampling_y;
+  cfl->subsampling_x = cm->subsampling_x;
+  cfl->subsampling_y = cm->subsampling_y;
 }
 
 // CfL computes its own block-level DC_PRED. This is required to compute both

av1/common/cfl.h

diff --git a/av1/common/cfl.h b/av1/common/cfl.h
index c6b72a4..165ad09 100644
--- a/av1/common/cfl.h
+++ b/av1/common/cfl.h
@@ -57,8 +57,7 @@
   { 0, 3 }, { 5, 1 }, { 1, 5 }, { 0, 5 }
 };
 
-void cfl_init(CFL_CTX *cfl, AV1_COMMON *cm, int subsampling_x,
-              int subsampling_y);
+void cfl_init(CFL_CTX *cfl, AV1_COMMON *cm);
 
 void cfl_dc_pred(MACROBLOCKD *xd, BLOCK_SIZE plane_bsize, TX_SIZE tx_size);
 

av1/common/onyxc_int.h

diff --git a/av1/common/onyxc_int.h b/av1/common/onyxc_int.h
index f3dc170..2db83fe 100644
--- a/av1/common/onyxc_int.h
+++ b/av1/common/onyxc_int.h
@@ -532,8 +532,7 @@
 #endif
 #if CONFIG_CFL
     xd->cfl = cfl;
-    cfl_init(cfl, cm, xd->plane[AOM_PLANE_U].subsampling_x,
-             xd->plane[AOM_PLANE_U].subsampling_y);
+    cfl_init(cfl, cm);
 #endif
     xd->above_context[i] = cm->above_context[i];
     if (xd->plane[i].plane_type == PLANE_TYPE_Y) {

av1/encoder/encodeframe.c

diff --git a/av1/encoder/encodeframe.c b/av1/encoder/encodeframe.c
index b6e0f5d..5e1f95a 100644
--- a/av1/encoder/encodeframe.c
+++ b/av1/encoder/encodeframe.c
@@ -4512,8 +4512,7 @@
 #if CONFIG_CFL
   MACROBLOCKD *const xd = &td->mb.e_mbd;
   xd->cfl = &this_tile->cfl;
-  cfl_init(xd->cfl, cm, xd->plane[AOM_PLANE_U].subsampling_x,
-           xd->plane[AOM_PLANE_U].subsampling_y);
+  cfl_init(xd->cfl, cm);
 #endif
 
 #if CONFIG_PVQ