Updated version of klauspost/reedsolomon with NEON support for ARM (#4865)

vendor/github.com/klauspost/reedsolomon/galois_amd64.go

@@ -17,7 +17,10 @@ func galMulAVX2Xor(low, high, in, out []byte)
 //go:noescape
 func galMulAVX2(low, high, in, out []byte)
 
-// This is what the assembler rountes does in blocks of 16 bytes:
+//go:noescape
+func sSE2XorSlice(in, out []byte)
+
+// This is what the assembler routines do in blocks of 16 bytes:
 /*
 func galMulSSSE3(low, high, in, out []byte) {
 	for n, input := range in {
@@ -71,3 +74,18 @@ func galMulSliceXor(c byte, in, out []byte, ssse3, avx2 bool) {
 		}
 	}
 }
+
+// slice galois add
+func sliceXor(in, out []byte, sse2 bool) {
+	var done int
+	if sse2 {
+		sSE2XorSlice(in, out)
+		done = (len(in) >> 4) << 4
+	}
+	remain := len(in) - done
+	if remain > 0 {
+		for i := done; i < len(in); i++ {
+			out[i] ^= in[i]
+		}
+	}
+}