libvpx: Pull from upstream

source/libvpx/vpx_dsp/arm/fwd_txfm_neon.c

 /*
  *  Copyright (c) 2015 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 152 matching lines @@
       // 01 11 21 31 41 51 61 71
       // 02 12 22 32 42 52 62 72
       // 03 13 23 33 43 53 63 73
       // 04 14 24 34 44 54 64 74
       // 05 15 25 35 45 55 65 75
       // 06 16 26 36 46 56 66 76
       // 07 17 27 37 47 57 67 77
     }
   }  // for
   {
-    // from vp9_dct_sse2.c
+    // from vpx_dct_sse2.c
     // Post-condition (division by two)
     //    division of two 16 bits signed numbers using shifts
     //    n / 2 = (n - (n >> 15)) >> 1
     const int16x8_t sign_in0 = vshrq_n_s16(input_0, 15);
     const int16x8_t sign_in1 = vshrq_n_s16(input_1, 15);
     const int16x8_t sign_in2 = vshrq_n_s16(input_2, 15);
     const int16x8_t sign_in3 = vshrq_n_s16(input_3, 15);
     const int16x8_t sign_in4 = vshrq_n_s16(input_4, 15);
     const int16x8_t sign_in5 = vshrq_n_s16(input_5, 15);
     const int16x8_t sign_in6 = vshrq_n_s16(input_6, 15);
@@ skipping 27 matching lines @@
   }
   {
     const int32x4_t a = vpaddlq_s16(sum);
     const int64x2_t b = vpaddlq_s32(a);
     const int32x2_t c = vadd_s32(vreinterpret_s32_s64(vget_low_s64(b)),
                                  vreinterpret_s32_s64(vget_high_s64(b)));
     output[0] = vget_lane_s16(vreinterpret_s16_s32(c), 0);
     output[1] = 0;
   }
 }