[XBOX] AC'97

With the the patch, the coder and mixer starts on xemu. Still no audio playback, though. To be re-tried after Pisya 's work on audio components.

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nForce native drivers are not directly usable because they relies on I/O port, instead of MMIO interfaces on Xbox - both for APU and AC97. A wrapper for the xbox hal's READ / WRITE PORT could be put on xbox hal to translate them in MMIO. Unfortunately setupapi sync is needed

Tried to install them anyway for reference:

• nForce 4.x driver has AC97 controller driver, installs and starts - no mixer
• nForce 5.x and 6.x driver has AC97 controller driver and APU drivers, installs, ac97 controller driver fail to start - apu controller driver starts - no mixer