[PATCH] ATY128 M3 Mirroring Fixes

This patch enables and configures the 2nd CRTC/PLL/DDA which gives
crystal clear output on my Dual USB iBook / ViewSonic A70F. Previously,
straight lines looked like a sin graph.

It's not finished, as there are few values hardcoded, but more testing
on other Apple laptops / Monitors and I'm looking for feedback.

Thanks,
Owen

PS - against 2.4.21-rc6-ben0

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Owen Stampflee - owen@stampflee.com - http://www.stampflee.com
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