DMA: Properly handle infinite linked lists, add cycle stealing

Fixes Tekken 2, Hot Wheels Turbo Racing, probably others.

src/core/gpu.h

@@ -394,7 +394,7 @@ protected:
 #if 0
     const u32 draw_ticks = static_cast<u32>((std::abs(x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2)) + 1u) / 2u);
 #else
-    const u32 draw_ticks = ((width + 1) / 2) * height;
+    const u32 draw_ticks = ((width + 2) / 3) * height;
 #endif
     AddCommandTicks(draw_ticks);
   }