libvpx: Pull from upstream

source/libvpx/vp8/common/arm/neon/dequantizeb_neon.asm

-;
-;  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.
-;
-
-
-    EXPORT  |vp8_dequantize_b_loop_neon|
-    ARM
-    REQUIRE8
-    PRESERVE8
-
-    AREA ||.text||, CODE, READONLY, ALIGN=2
-; r0    short *Q,
-; r1    short *DQC
-; r2    short *DQ
-|vp8_dequantize_b_loop_neon| PROC
-    vld1.16         {q0, q1}, [r0]
-    vld1.16         {q2, q3}, [r1]
-
-    vmul.i16        q4, q0, q2
-    vmul.i16        q5, q1, q3
-
-    vst1.16         {q4, q5}, [r2]
-
-    bx             lr
-
-    ENDP
-
-    END