libvpx: Pull from upstream

source/libvpx/vp9/common/vp9_blockd.h

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 150 matching lines @@
                                     const MODE_INFO *left_mi, int b);
 
 PREDICTION_MODE vp9_above_block_mode(const MODE_INFO *cur_mi,
                                      const MODE_INFO *above_mi, int b);
 
 enum mv_precision {
   MV_PRECISION_Q3,
   MV_PRECISION_Q4
 };
 
-#if CONFIG_ALPHA
-enum { MAX_MB_PLANE = 4 };
-#else
 enum { MAX_MB_PLANE = 3 };
-#endif
 
 struct buf_2d {
   uint8_t *buf;
   int stride;
 };
 
 struct macroblockd_plane {
   int16_t *dqcoeff;
   PLANE_TYPE plane_type;
   int subsampling_x;
@@ skipping 130 matching lines @@
 
 void vp9_set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd,
                       BLOCK_SIZE plane_bsize, TX_SIZE tx_size, int has_eob,
                       int aoff, int loff);
 
 #ifdef __cplusplus
 }  // extern "C"
 #endif
 
 #endif  // VP9_COMMON_VP9_BLOCKD_H_