libvpx: Pull from upstream

source/libvpx/vp8/common/ppc/platform_altivec.asm

Index: source/libvpx/vp8/common/ppc/platform_altivec.asm
diff --git a/source/libvpx/vp8/common/ppc/platform_altivec.asm b/source/libvpx/vp8/common/ppc/platform_altivec.asm
deleted file mode 100644
index f81d86f740e241c1340dc33a81a0fa9a5016f47d..0000000000000000000000000000000000000000
--- a/source/libvpx/vp8/common/ppc/platform_altivec.asm
+++ /dev/null
@@ -1,59 +0,0 @@
-;
-;  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.
-;
-
-
-    .globl save_platform_context
-    .globl restore_platform_context
-
-.macro W V P
-    stvx    \V,  0, \P
-    addi    \P, \P, 16
-.endm
-
-.macro R V P
-    lvx     \V,  0, \P
-    addi    \P, \P, 16
-.endm
-
-;# r3 context_ptr
-    .align 2
-save_platform_contex:
-    W v20, r3
-    W v21, r3
-    W v22, r3
-    W v23, r3
-    W v24, r3
-    W v25, r3
-    W v26, r3
-    W v27, r3
-    W v28, r3
-    W v29, r3
-    W v30, r3
-    W v31, r3
-
-    blr
-
-;# r3 context_ptr
-    .align 2
-restore_platform_context:
-    R v20, r3
-    R v21, r3
-    R v22, r3
-    R v23, r3
-    R v24, r3
-    R v25, r3
-    R v26, r3
-    R v27, r3
-    R v28, r3
-    R v29, r3
-    R v30, r3
-    R v31, r3
-
-    blr