Merge MagicEyes VRender3D and MP2520F SoC implementations

[angelosa]

MagicEyes post-VRender0 SoCs all have reusable subdevice components. These implementation details can be moved into specific device containers, we currently have prototypes in:

• gp2x.cpp
• nexus3d.cpp
• magiceyes_pollux_vr3520f.cpp

By doing this we eventually achieve the goal of making additional chip support easy to configure (cfr. MagicEyes Pollux VR3520F used by GP2X Caanoo).

[angelosa]

References:

• https://www.arcade-projects.com/threads/kiddy-ride-trans-dakar-ii-hitbox3-system-game-plus-co-ltd.20646/ (a kiddie ride using the "Hit Box 3" VR3511F)
• https://web.archive.org/web/20090106175444fw_/http://www.igameplus.com/cross_forum.htm (some extra dev details concerning Hit Box 3, including use of OpenGLES + OpenAL for AC'97)

Looks like there are way more systems using [VRender3D based technology], there's a GamePark XGP prototype then 3+ Arcade variants codenamed "Hitbox2/3" then various PnP

• https://github.com/jkent/pollux-micromon