common: Rework timekeeping with native RDTSC and port to linux

src/video_core/tile_manager.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "common/types.h"
+
+namespace VideoCore {
+
+void ConvertTileToLinear(void* dst, const void* src, u32 width, u32 height, bool neo);
+
+} // namespace VideoCore