Add MSA optimized I422ToARGBRow_MSA and I422ToRGBARow_MSA functions

source/scale_argb.cc

Index: source/scale_argb.cc
diff --git a/source/scale_argb.cc b/source/scale_argb.cc
index 17f51ae9bf810f107dd450674a2c918318b00ac2..b2a139677bf8cda82ab8b145900b8fb66ac8e404 100644
--- a/source/scale_argb.cc
+++ b/source/scale_argb.cc
@@ -474,6 +474,14 @@ static void ScaleYUVToARGBBilinearUp(int src_width, int src_height,
     I422ToARGBRow = I422ToARGBRow_DSPR2;
   }
 #endif
+#if defined(HAS_I422TOARGBROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    I422ToARGBRow = I422ToARGBRow_Any_MSA;
+    if (IS_ALIGNED(src_width, 8)) {
+      I422ToARGBRow = I422ToARGBRow_MSA;
+    }
+  }
+#endif
 
   void (*InterpolateRow)(uint8* dst_argb, const uint8* src_argb,
       ptrdiff_t src_stride, int dst_width, int source_y_fraction) =