Add MSA optimized I422ToARGBRow_MSA and I422ToRGBARow_MSA functions

source/convert_from.cc

Index: source/convert_from.cc
diff --git a/source/convert_from.cc b/source/convert_from.cc
index 89d24f4740e6f4ef285c82e4cd5848bffc577eb9..7847622cdf856908b1944c60c9aa3c465e60913e 100644
--- a/source/convert_from.cc
+++ b/source/convert_from.cc
@@ -459,6 +459,14 @@ static int I420ToRGBAMatrix(const uint8* src_y, int src_stride_y,
     I422ToRGBARow = I422ToRGBARow_DSPR2;
   }
 #endif
+#if defined(HAS_I422TORGBAROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    I422ToRGBARow = I422ToRGBARow_Any_MSA;
+    if (IS_ALIGNED(width, 8)) {
+      I422ToRGBARow = I422ToRGBARow_MSA;
+    }
+  }
+#endif
 
   for (y = 0; y < height; ++y) {
     I422ToRGBARow(src_y, src_u, src_v, dst_rgba, yuvconstants, width);
@@ -848,6 +856,14 @@ int I420ToRGB565Dither(const uint8* src_y, int src_stride_y,
     I422ToARGBRow = I422ToARGBRow_DSPR2;
   }
 #endif
+#if defined(HAS_I422TOARGBROW_MSA)
+  if (TestCpuFlag(kCpuHasMSA)) {
+    I422ToARGBRow = I422ToARGBRow_Any_MSA;
+    if (IS_ALIGNED(width, 8)) {
+      I422ToARGBRow = I422ToARGBRow_MSA;
+    }
+  }
+#endif
 #if defined(HAS_ARGBTORGB565DITHERROW_SSE2)
   if (TestCpuFlag(kCpuHasSSE2)) {
     ARGBToRGB565DitherRow = ARGBToRGB565DitherRow_Any_SSE2;