libvpx: Pull from upstream

source/libvpx/vpx_dsp/arm/idct4x4_1_add_neon.c

 /*
  *  Copyright (c) 2014 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.
  */
 
 #include <arm_neon.h>
 
 #include "vpx_dsp/inv_txfm.h"
 #include "vpx_ports/mem.h"
 
-void vp9_idct4x4_1_add_neon(
+void vpx_idct4x4_1_add_neon(
         int16_t *input,
         uint8_t *dest,
         int dest_stride) {
     uint8x8_t d6u8;
     uint32x2_t d2u32 = vdup_n_u32(0);
     uint16x8_t q8u16;
     int16x8_t q0s16;
     uint8_t *d1, *d2;
     int16_t i, a1, cospi_16_64 = 11585;
     int16_t out = dct_const_round_shift(input[0] * cospi_16_64);
@@ skipping 14 matching lines @@
                          vreinterpret_u8_u32(d2u32));
         d6u8 = vqmovun_s16(vreinterpretq_s16_u16(q8u16));
 
         vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 0);
         d2 += dest_stride;
         vst1_lane_u32((uint32_t *)d2, vreinterpret_u32_u8(d6u8), 1);
         d2 += dest_stride;
     }
     return;
 }