LibVideo: Rename MV to MotionVector for clarity

Userland/Libraries/LibVideo/VP9/MotionVector.h

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Types.h>
+
+namespace Video::VP9 {
+
+class MotionVector {
+public:
+    MotionVector() = default;
+    MotionVector(u32 row, u32 col);
+
+    u32 row() const { return m_row; }
+    void set_row(u32 row) { m_row = row; }
+    u32 col() const { return m_col; }
+    void set_col(u32 col) { m_col = col; }
+
+    MotionVector& operator=(i32 value);
+    MotionVector operator+(MotionVector const& other) const;
+
+private:
+    u32 m_row { 0 };
+    u32 m_col { 0 };
+};
+
+}