[Patch 1/1 resend] pata_via.c: Add VIA VX900 support

[BruceChang at via.com.tw]

Hello Stefan: 
>  One thing, could you please get back to Joseph and Jeff and ask whether they could send a note about this patch to stable at kernel.org.
Sure, I think Joseph should have done that. Let me check with him.

Thanks and Best Regards
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Bruce C. Chang(張祖明)
VIA Technologies, Inc.
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