ARGBToYJRow_AVX2 hooked up for ARGBToJ422

BUG=none
TESTED=ARGBToJ422 unittest

Review URL: https://webrtc-codereview.appspot.com/44079004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1360 16f28f9a-4ce2-e073-06de-1de4eb20be90

source/convert_from_argb.cc

@@ -1211,6 +1211,14 @@ int ARGBToJ422(const uint8* src_argb, int src_stride_argb,
     }
   }
 #endif
+#if defined(HAS_ARGBTOYJROW_AVX2)
+  if (TestCpuFlag(kCpuHasAVX2)) {
+    ARGBToYJRow = ARGBToYJRow_Any_AVX2;
+    if (IS_ALIGNED(width, 32)) {
+      ARGBToYJRow = ARGBToYJRow_AVX2;
+    }
+  }
+#endif
 #if defined(HAS_ARGBTOYJROW_NEON)
   if (TestCpuFlag(kCpuHasNEON)) {
     ARGBToYJRow = ARGBToYJRow_Any_NEON;