Remove old alpha blend, expose GetARGB2Blend, fix ComputeSumSquareErrorPlane on SSE2
BUG=29
TEST=none
Review URL: https://webrtc-codereview.appspot.com/469005

git-svn-id: http://libyuv.googlecode.com/svn/trunk@234 16f28f9a-4ce2-e073-06de-1de4eb20be90
diff --git a/source/rotate_neon.cc b/source/rotate_neon.cc
index 0240fe1..7ff9936 100644
--- a/source/rotate_neon.cc
+++ b/source/rotate_neon.cc
@@ -17,7 +17,7 @@
 extern "C" {
 #endif
 
-#if defined(__ARM_NEON__) && !defined(YUV_DISABLE_ASM)
+#if !defined(YUV_DISABLE_ASM) && defined(__ARM_NEON__)
 
 static const uvec8 vtbl_4x4_transpose =
   { 0,  4,  8, 12,  1,  5,  9, 13,  2,  6, 10, 14,  3,  7, 11, 15 };